California Fruit and Vegetable

Category: Rooting Vegetables

  • CA Utilized Vegetable Production Value Shows Slight Decline

    California leads the nation in vegetable production, accounting for 39% of the U.S. vegetable acreage. The value of California’s 2020 utilized vegetable production dropped 0.9% to $7.68 billion compared to 2019’s value of $7.74 billion according to the USDA National Agricultural Statistics Service, Pacific Regional Field Office.

    Despite the decrease in state’s overall total value of utilized production, crops showing an increase included broccoli, cantaloupe, lettuce of all types, sweet potatoes, and tomatoes. California fresh market and processing vegetable growers planted 939,700 acres of principal vegetable crops in 2020, down 3% from 2019. Utilized production totaled 433.8 million hundred weight up slightly from 2019’s 431.7 million hundred weight.

    USDA NASS recently posted the Vegetables 2020 Summary for vegetables grown during the 2020 crop year in California and across the U.S. The report includes survey data collected for acreage, production, marketing year price and value collected on an annual basis for 26 vegetable and melon crops in the U.S. Questionnaire content, survey timetables, and survey administration are state specific. Data are gathered by telephone interviews, mail-out/mail-back, faxed questionnaires, and personal interviews.

    Family favorites grown in California include artichokes, broccoli, carrots, garlic, tomatoes, and more. For a copy of the full report, visit Vegetables 2020 Summary. Just interested in California? Here are comments on 2020 crops where The Golden State is the largest producer. The data reflects U.S. numbers:

    Artichokes: Total production in 2020 totaled 812,000 cwt, down 15% from 2019. Planted area was estimated at 5,900 acres, down 11% from the previous year. Area harvested, at 5,800 acres, was down 12% from 2019. The value of the crop totaled $62.6 million, 16% below the previous season. Utilized production totaled 792,500 cwt, all of which was for the fresh market. In California, artichokes enjoyed a routine spring with strong supplies and steady demand. The March increase could be attributed to consumers pushing the demand for healthy vegetables. The pandemic temporarily impacted labor availability and elevated production costs, but generally favorable weather resulted in good quality and production.

    Broccoli: Total production in 2020 totaled 15.8 million cwt, down 5% from 2019. Planted area was estimated at 100,900 acres, down 4% from the previous year. Area harvested, at 100,300 acres, was also down 4% from 2019. The value of the crop totaled $875 million, 3% more than the previous year. Utilized production totaled 15.8 million cwt, of which 15.3 million cwt was for the fresh market and 25,060 tons for processing. In California, the pandemic caused a variety of changes in the marketplace. Most notably was the decreased demand from the food service industry for broccoli. Growers plowed under broccoli due to limited demand by the hospitality industry.

    Cabbage: Total production in 2020 totaled 23.7 million cwt, up 6% from 2019. Planted area was estimated at 60,600 acres, down 3% from the previous year. Area harvested, at 58,600 acres, was down 3% from 2019. The value of the crop totaled $428 million, 16% less than the previous season. Utilized production totaled 23.6 million cwt, of which 19.1 million cwt was for the fresh market and 224,241 tons for processing. In California, weather during the planting in the fall of 2019 and through head development in 2020 was favorable. No reports of pathogen impact were reported for the crop.

    Cantaloupes: Total production in 2020 totaled 11.3 million cwt, a slight increase from 2019. Planted areas was estimated at 41,000 acres, down 15% from the previous year. Area harvested, at 40,600 acres, down 15% from 2019. The value of the crop total was $296 million, an increase of 24% from previous year. The utilized production was 11.3 million cwt, all of which was for the fresh market. In California, lack of rainfall during the spring months and high temperatures during the summer months provided ideal growing conditions for cantaloupes compared to last year.

    Carrots: Total production in 2020 totaled 31.1 million cwt, down 6% from 2019. Planted area was estimated at 69,900 acres, down 4% from the previous year. Area harvested, at 69,700 acres, was down 3% from 2019. The value of the crop totaled $716 million, 7% less than the previous year. Utilized production totaled 31.1 million cwt, of which 22.3 million cwt was for the fresh market and 441,787 tons for processing. In California, the largest producing State, the carrot market was steady through the spring of the year. In the heavily farmed central portion of the Cuyama Valley, where a lot of California’s carrots are grown, the water table continued to drop in 2020.

    Cauliflower: Total production in 2020 totaled 9.0 million cwt, down 11% from 2019. Planted area was estimated at 42,500 acres, down 6% from the previous year. Area harvested, at 42,200 acres, was down 7% from 2019. The value of the crop totaled $346 million, 25% less than the previous season. Utilized production totaled 8.9 million cwt, of which 8.8 million cwt was for the fresh market and 2,724 tons for processing. In California, growers have seen dramatic movement of cauliflower during the pandemic. This year has seen generally shrinking volume from the beginning of February, and lower volume than the previous two year since the beginning of March. Pricing is below the prior two years and continues decreasing, although price has not stabilized, the rate of decrease has slowed.

    Celery: Total production in 2020 totaled 16.1 million cwt, up 2% from 2019. Planted area was estimated at 29,200 acres, up 4% from the previous year. Area harvested, at 28,800 acres, increased 2% from the previous year. The value of the crop totaled $359 million, down 24% from previous year. Utilized production for 2020 totaled 16.1 million cwt, up 2% from 2019.
    In California, growers reported higher production but price dropped considerably.

    Garlic: Total production in 2020 totaled 3.46 million cwt, down 10% from 2019. Planted area was estimated at 24,700 acres, unchanged from the previous year. Area harvested, at 24,700 acres, was unchanged from 2019. The value of the crop totaled $264 million, 12% less than the previous season. Utilized production totaled 3.46 million cwt, of which 1.21 million cwt was for the fresh market and 112,385 tons for processing. In California, producers were tempered by soil borne pathogens that reduced yield in some areas, though overall the growing season experienced favorable weather.

    Honeydew: Total production in 2020 totaled 2.36 million cwt, down 9% from 2019. Planted area was estimated at 7,600 acres, down 25% from the previous year. Area harvested, at 7,600 acres, was also down 25% from 2019. The value of the crop totaled $49.2 million, down 11% from the previous season. Utilized production totaled 2.36 million cwt, all of which was for the fresh market. In California, lack of rainfall during the spring months and high temperatures during the summer months provided ample growing conditions for honeydew compared to last year.

    Head lettuce: Total production in 2020 totaled 40.7 million cwt, down 3% from 2019. Planted area was estimated at 114,000 acres, down 2% from the previous year. Area harvested, at 112,900 acres, was down 3% from 2019. The value of the crop totaled $1.25 billion, 12% less than the previous season. Utilized production totaled 40.7 million cwt, all of which was for the fresh market. In California, the largest producing State, higher than normal temperatures in the central valley resulted in substantial losses. In the coastal region, warm weather and wildfires affected supplies later in the year. Significant occurrences of crop disease also contributed to a tight market, prompting concerns of shortages in other parts of the country. Some producers in Arizona and California have allowed some head lettuce to die in the field or to be disced under, due to decreased sales to food service companies.

    Leaf lettuce: Total production in 2020 totaled 15.6 million cwt, up 25% from 2019. Planted area was estimated at 62,900 acres, up 9% from the previous year. Area harvested, at 61,700 acres, was also up 8% from 2019. The value of the crop totaled $800 million, 23% more than the previous season. Utilized production totaled 15.6 million cwt, all of which was for the fresh market. In California, some growers did not harvest their fields during the spring in response to market conditions, but demand improved as the year progressed. There was a small amount of heat damage to the crop, but yields were up significantly from the previous year. Quality was reported to be fair and demand was strong enough to keep prices up. However, some producers in Arizona and California have allowed some leaf lettuce to die in the field or to be disced under, due to decreased sales to food service companies.

    Romaine lettuce: Total production in 2020 totaled 30.3 million cwt, up 11% from the 2019 total. Planted area was estimated at 93,100 acres, up 4% from the previous year. Area harvested, at 91,500 acres, was up 4% from 2019. The value of the crop totaled $948 million, 8% more than the previous season. Utilized production totaled 30.3 million cwt, all of which was for the fresh market. In California, there were quality issues in the late summer crop as instances of Sclerotinia and Impatiens Necrotic Spot Virus were found in the Central Coast region. In November, there was a voluntary recall of Romaine lettuce due to a potential outbreak of E.coli. Overall, yields were up from a year ago. Some producers in Arizona and California have allowed Romaine lettuce to die in the field or to be disced under, due to decreased sales to food service companies.

    Onions: Total production in 2020 totaled 75.2 million cwt, up 8% from 2019. Planted area was estimated at 134,700 acres, up 2% from the previous year. Area harvested, at 132,800 acres, was up 3% from 2019. The value of the crop totaled $878 million, 12% less than the previous year. Utilized production totaled 73.5 million cwt, of which 49.5 million cwt was for the fresh market and 1.20 million tons were for processing. In California, the largest producing State, growers reported the summer being too hot too early. Later in the summer there wasn’t enough sun when wildfires blanketed the state in smoke for months.

    Bell peppers: Total production in 2020 totaled 11.7 million cwt, up 1% from 2019. Planted area was estimated at 38,100 acres, up 1% from the previous year. Area harvested, at 37,100 acres, was up 1% from 2019. The value of the crop totaled $479 million, 11% less than the previous year. Utilized production totaled 11.7 million cwt, of which 8.22 million cwt was for the fresh market and 171,808 tons for processing. In California, the summer turned very hot early, which quickly turned bad as fires ravaged through large portions of the state burning cropland and producing a thick layer of smoke blocking the sun for months. Some producers had to divert peppers intended for fresh market to processors as state lockdowns caused stoppages in the supply chain.

    Spinach: Total production in 2020 totaled 7.23 million cwt, down 24% from 2019. Planted area was estimated at 56,800 acres, down 14% from the previous year. Area harvested, at 56,200 acres, was also down 14% from 2019. The value of the crop totaled $439 million, 28% less than the previous season. Utilized production totaled 7.23 million cwt, of which 6.45 million cwt was for the fresh market and 39,204 tons for processing. In California, the largest producing State, the coastal regions experienced damaging cold temperatures in early spring, bringing yields down below last year. Acreage decreased after some growers responded to a drop in demand by plowing under their fields.

    Sweet potatoes: Total production in 2020 totaled 30.7 million cwt, down 4% from 2019. Planted area was estimated at 158,000 acres, up 7% from the previous year. Area harvested, at 156,800 acres, was up 7% from 2019. The value of the crop totaled $726 million, 10% more than the previous season. Utilized production totaled 30.6 million cwt, of which 23.9 million cwt was for the fresh market and 331,638 tons for processing.

    Tomatoes: Total production in 2020 totaled 241 million cwt, up 1% from 2019. Planted area was estimated at 280,000 acres, down 1% from the previous year. Area harvested, estimated at 272,900 acres, was down slightly from 2019. The value of the crop totaled $1.66 billion, 4% more than the previous season. Utilized production totaled 239 million cwt, of which 12.6 million cwt was for the fresh market and 11.3 million tons for processing. In California, there were no major issues during planting, but higher than average temperatures in late spring affected early crop yields. Inconsistent weather patterns throughout the growing season prompted short interruptions in the flow of ripe tomatoes. Wildfires that raged through the state in late summer and early fall slowed the processing tomato harvest. Crop quality varied by region and disease pressure was low. Due to a lack of rain, water availability continued to be a concern.

    For more agricultural statistics, visit www.nass.usda.gov.

  • Purple Sweetpotatoes for Thanksgiving, Christmas & More

    Bright-orange sweetpotatoes are a staple of many American Thanksgiving dinners and are often prepared with a traditional family recipe. But this year, why not start a new tradition with purple-fleshed sweetpotatoes?

    Both colors of sweetpotato are high in dietary fiber, vitamins, and minerals, but the purple varieties are also rich in health-beneficial antioxidants called anthocyanins and phenolic acids. Anthocyanins are plant pigments that make blueberries blue and cherries cherry-red, and the antioxidant activities in purple sweetpotatoes can be at similar levels to these antioxidant-rich fruits. Various studies have indicated that anthocyanins and phenolics from purple‐fleshed sweetpotatoes may have potential health benefits.

    A team of scientists from the Agricultural Research Service’s Food Science and Market Quality and Handling Research Unit in Raleigh, NC, collaborated with researchers at North Carolina State University to find ways to preserve purple-fleshed sweetpotatoes’ anthocyanin levels during processing into products like juice or natural colorants. Typically, heat is used during processing, but heat changes the flavor and prevents isolation and use of sweetpotato starch and fiber. But if heat is not used, then the flesh quickly browns due to the same enzymes that turn sliced apples brown.

    The scientists wanted to figure out a heat-free way to extract the juice and pigments directly from the raw purple sweetpotato. After those are extracted, what’s left is raw starch and fiber (pomace), each with its own uses and benefits.

    The team successfully used water containing a small amount of citric acid, a substance naturally present in citrus fruits, to inactivate the browning enzymes and preserve an appealing reddish-purple color in the fresh juice and pomace. Preserving the high anthocyanin content makes these products desirable as functional ingredients in beverages and other food products. This research can pave the way for sweetpotato processors to produce new, value-added products. The team published the study in the Journal of Food Science in 2019.—By Sue Kendall, USDA ARS Office of Communications.

  • National Project Tackles Virus Threats to Potato Industry

    A University of Idaho-led team will tackle a pair of viruses that cause major losses to the potato industry.

    U of I researcher and potato virus expert Alex Karasev will lead the project funded by a $5.8 million grant from the U.S. Department of Agriculture National Institute for Food and Agriculture.

    The team of two dozen scientists will target potato virus Y (PVY) and potato mop top virus (PMTV) in seed potatoes, the first level of commercial potato production, and in potatoes grown for market.

    The project involves seed improvement organizations nationally that certify seed potatoes are disease free.

    Long known as a serious problem for growers, PVY damages plants and reduces yields and the size of the potatoes, making the crop less valuable. An earlier U of I study estimated losses from PVY cost Idaho’s potato industry $34 million a year and reduced potential yields by 10 to 50%.

    PMVT presents the potato industry with a new problem. Six states have found the virus in their seed potato crops. An estimated 5% of Maine’s seed potatoes carry PMTV. The virus is transmitted by protists, microbes that have qualities of fungi and algae.

    The project includes university researchers in 10 potato-growing states, including Idaho, Colorado, New York and Oregon, and USDA Agricultural Research Service scientists based in Prosser, Washington, and Aberdeen, Idaho. U of I researchers in Idaho Falls, Kimberly and Moscow will work on the project.

    The new four-year project continues work Karasev participated in that was originally led by a New York-based researcher who retired earlier this year.

    “Because of its position as the nation’s top potato-producing state, it is fitting that Idaho is leading the project,” Karasev said.

    The most immediate goal is to give potato growers tools to control the viruses with better ways to test plants and fields. A key medium-range goal focuses on strategies to control pests that spread the viruses and to educate growers. A long-range priority is identifying genes that can provide resistance to the viruses and their vectors. Those genes can help potato breeding programs to develop new varieties.

    Developing better testing can help seed potato producers to limit the spread of the viruses and prevent losses in the field and storage.

    Researchers will study the economic impacts of the viruses and develop ways to communicate with and educate growers about the best strategies to reduce the viruses’ impacts.

    Karasev won a mid-career award from U of I in 2013 partly for his work on PVY, which became an issue for Idaho growers in the early 2000s. He recently turned his attention to PMTV as its threat to the potato industry increased.

    This project, titled “Development of Sustainable System-based Management Strategies for Two Vector-borne, Tuber Necrotic Viruses in Potato,” is funded under the U.S. Department of Agriculture National Institute of Food and Agriculture grant No. 2020-51181-32136. The total project funding is $5,756,299 of which 100% is the federal share.

  • Why Aren’t My Beans Drying Down?

    We cut our blackeye bean (cowpea) research plots at UC Davis almost 3 weeks ago and they’re still too green to harvest. If we tried now, the vines would get wrapped around the threshing cylinder.  Several growers in the Sacramento Valley have mentioned that their corn has sat at the same moisture level for weeks and is not drying down either, as one would normally expect for this time of year. But, nothing is normal this year!

    Why aren’t our crops drying down?

    Tragic fires throughout the West have pushed a lot of smoke and ash into the sky, creating fog-like conditions that reduce the intensity of the sun, shade crops, and lower temperatures. The blanket of smoke is like stepping into the shade under an awning on a 90oF day. This reduced sun intensity has affected the ability of crops to dry down in a timely manner. Increased humidity levels this past weeks haven’t helped either.

    While shading may be good for protecting tomatoes from sunburn with harvests running late due to COVID-related challenges, it is not good for drying down field crops.

    With the smoke finally dissipating, drying conditions are improving. We ended up turning our blackeye bean crop over to increase aeration and help it dry down.  Dry beans are sometimes turned to help dry the crop down, especially if they’re rained on, but the challenge is to be careful to prevent shattering.

    In corn, there aren’t any easy solutions.  One grower said their corn sat at 16.5% moisture for several weeks and finally they had to harvest it anyway. Dryers are available for drying corn and other crops to the proper storage moisture, but as we all know it’s expensive and with low grain prices this affects the bottom line.  — By Sarah Light & Rachael Freeman Long, UC Cooperative Extension

  • Watermelon Master Classes to Educate, Inform & Inspire

    The first of its kind, the Watermelon Virtual Master Classes were arguably one of the largest pivots of the Spring-Summer season for the communications program of the National Watermelon Promotion Board (NWPB). The challenge was to move an NYC-based freelance summertime media event to online: a virtual version for the at-home world of media and influencers to educate, inform and inspire watermelon content and coverage.

    The reinvention of the media event turned into three separate virtual events with three different topics, three different presenters with three sets of recipe ideas, sending out three different curated boxes of watermelon goodies for the media to enjoy and utilize for their Watermelon Master Classes. The strategies were tri-fold:

    • Lean on “Back to Basics” materials to educate at-home cooks on easy ways to get creative with watermelon
    • Leverage “Use the Whole Watermelon” messaging to encourage use of the rind and juice
    • Develop strong relationships with members of the media and influence their watermelon content for months to come

    NWPB spent weeks pitching media contacts from major publications, in a time when much of the country was in a “shelter in place” order, to offer an at-home, free event to create content and excitement about the sweet summer staple. Additionally NWPB provided education focused on a year-round message to extend the seasonal reach and amplify watermelon’s appeal.

    “We confirmed attendees across the country, rather than have to only host those based in the NYC-area. We sent out custom curated watermelon boxes with a mix of items related to each class and related to our brand: a logoed chef’s apron and a new kitchen knife, a cocktail shaker and food pun spatula, etc. The boxes generated excitement and enthusiasm for the classes, and each one was well attended… with the cameras turned ON!” said Stephanie Barlow, senior director of communications.

    Further, the timing of the classes gave many attendees the opportunity to create their own watermelon content this summer, in time for National Watermelon Day and beyond. Several attendees posted on their personal social pages, where media turn into influencers and endorse watermelon recipes, usage ideas and health benefits. In total, NWPB hosted 60 food editors, writers and media dietitians. Their enthusiasm and delight over the events ensures earned media attention for watermelon to come for months.

    “To date, we have nearly 40 social media posts and 15 articles covering these events, which wasn’t even one of the main strategies but it is additional earned content on their personal influencer networks. We look forward to building long lasting partnerships with writers and their publications in the coming year,” said Barlow.

    These were the Watermelon Master Classes:

    ·       Watermelon Wellness with Pam Smith, RDN featuring Salted Watermelon Woju, Watermelon Overnight Oats, Watermelon Poke Salad and a Watermelon Yogurt Smoothie

    ·       The Ultimate Watermelon Workshop with cookbook authors Mark Scarbrough and Bruce Weinstein, creating Thai-inspired Watermelon Rind Salad, Curried Wheatberry Watermelon Salad and Watermelon, and Prosciutto and Mozzarella Skewers

    ·       Summer Sips Watermelon Cocktails with Jordan Catapano from This Girls Walks into a Bar, mixing a Watermelon Rose Sangria, Watermelon Gimlet and a Summer into Fall Cocktail

    Each of the classes incorporated watermelon key messages of health, value, versatility and year-round availability, but also gave attendees the opportunities to ask questions to the hosts or the watermelon experts from NWPB.

    “The engaging questions were rampant throughout all the classes, asking everything from watermelon storage techniques to flavor pairings, or alternative ingredients when you couldn’t find elderflower liqueur or red wheat berries, which effectively made these events much richer than a plain recipe demonstration,” Barlow continued.

    About National Watermelon Promotion Board

    The National Watermelon Promotion Board (NWPB), based in Winter Springs, Florida, was established in 1989 as an agricultural promotion group to promote watermelon in the United States and in various markets abroad. Funded through a self-mandated industry assessment paid by more than 800 watermelon producers, handlers and importers, NWPB mission is to increase consumer demand for watermelon through promotion, research and education programs.

    Watermelon packs a nutritious punch, with each serving providing an excellent source of Vitamin C (25%), a source of Vitamins A ( 8%) and B6 (8%), and a delicious way to stay hydrated (92% water), with only 80 calories. For additional information, visit www.watermelon.org.

  • Fresh Produce Veterans Reimagining the Procurement Experience

    Fresh produce industry veterans Doug Fisher and Joe Cimino — each with over 30 years of growing, buying and distribution experience — have teamed up to form Re Fresh, a new produce procurement company. Re Fresh combines break-through predictive analytics with the more personal old-school way of doing business, to enhance produce procurement for buyers and growers.

    “Buying and selling produce used to be a simple, trust-based business, where nothing mattered more than personal relationships and integrity” explained Joe Cimino, co-founder, “we believe this is still the best way to conduct business, especially when it is combined with sophisticated modeling and predictive analytics to provide insight into supply, demand and pricing trends.”

    In addition to a focus on personal connections and relationships to better integrate with customer needs, Re Fresh’s business model is based on a culture of accountability, transparency, and a passion for produce combined with deep market intelligence and insights.

    “We use sophisticated technology and predictive analytics to help us advise clients to make better data-driven business decisions and buying moves. However, we will not let our systems or technology get in the way of boots-on-the-ground experience or personal communication and insights,” added Doug Fisher, co-founder. “We will still be visiting with and picking up the phone to talk to our customers and suppliers on a regular basis, as nothing can replace personal connections.”

    With their long history and broad connections in the Salinas Valley, Fisher and Cimino are assembling a Re Fresh team of like-minded, experienced produce procurement experts with deep supplier relationships to join them. Fisher and Cimino are eager to continue utilizing their industry passion and expertise to enhance the produce procurement process.

    About Re Fresh:
    Re Fresh is reimagining the procurement experience, combining industry insights and extensive relationships to help retailers, food service operators and wholesalers across the USA and Canada to ensure a steady supply of transparently sourced and correctly priced fresh produce. To learn more, visit www.refreshproduce.com.

  • Broomrape: a Parasitic Weed in CA Processing Tomato

    Figure 1: Branched broomrape infestation in a processing tomato in California.

    Branched broomrape (Phelipanche ramosa), a weedy parasitic plant that can cause devastating damage to many economically important wide range of broadleaf crops including tomato, cabbage, potato, eggplant, carrot, pepper, beans, celery, peanut and sunflower has recently re-emerged in fields in Central Valley counties in California. This weed utilizes a modified root, called haustorium, to fuse into a host plant root and extract nutrients and water which can greatly reduce productivity or even kill the host depending on the level of infestation, susceptibility of the host, and environmental conditions. Tomato is highly susceptible to branched broomrape. In the United States, California accounted for over 90% of the 12 million tons of tomatoes grown in 2018. Studies in Israel showed that at extreme infestation levels broomrape can cause processing tomato yield losses as high as 70%. The annual losses in tomato due to broomrapes in Israel and Turkey are estimated at $5 and $200 million, respectively. Up to 80% crop loss due to branched broomrape has been reported in tomato in Chile which is highly concerning given the similarity in production systems and broomrape species with California.

     
    Figure 2: A close view of a flowering branched broomrape

    Branched broomrape is currently classified in California as an “A” pest, that is, “an organism of known economic importance subject to California State enforced action involving: eradication, quarantine regulation, containment, rejection, or other holding action”. As a potentially severe economic pest and as a California “A-list” pest, establishment and spread of a branched broomrape in California tomato production regions could cause severe consequences for individual growers and for the entire tomato industry. Currently, discovery of broomrape in a commercial tomato field leads to a hold order and crop destruction without harvest. In addition to branched broomrape, several fields have been reported with infestations of Egyptian broomrape (Phelipanche aegyptiaca), a Q-listed species (that is, having a temporary “A” classification pending determination of permanent rating by California State), causing similar industry and grower concerns.

     
    Figure 3: Hundreds of tiny branched broomrape seeds (0.2 – 0.4 mm) and the single capsule from which the seeds were sourced.

    In the United States, branched broomrape was first reported in 1890, and since then, over 150 occurrences of branched broomrape have been documented. In recent times, reports of branched broomrape in the United States have been increasing; from 7 occurrences in 2015 to 65 in 2019. Branched broomrape has been documented in Texas, Virginia, South Carolina, Illinois, New Jersey, Tennessee, Kentucky, Alabama and California. In California, the first reported case of branched broomrape was in Butte County (1903) and later in Alameda County (1929). Other counties in California with reported branched broomrape detections include Colusa, Sacramento, San Benito, Santa Clara, San Joaquin, Ventura and Yolo.

    Figure 4: Distribution of branched broomrape in California as of November 10, 2019. Data source: Calflora and GBIF 2019

    A severe infestation of branched broomrape in the Sacramento Valley in 1959 prompted an intervention that involved soil fumigation with methyl bromide to target the soil seedbank; this was as an industry-led effort funded through a legislative marketing order program. Branched broomrape became a less significant problem after that effort which involved research, intensive field surveys, and fumigation of infested fields and equipment from 1973 to 1982 that cost over $1.5 million. However, this parasitic weed has recently been detected in several tomato fields in Yolo, Solano (Egyptian broomrape) and San Joaquin Counties. The cause of the re-emergence of the problem remains unclear, although re-introduction or recurrence from long-dormant seed in the soil and subsequent spread have been speculated.

    Figure 5: A branched broomrape plant attached to a volunteer tomato root in a processing tomato field in mid-June.

    The re-emergence of branched broomrape in California is of concern to the processing tomato industry as: 1) the experience in other regions of the world has demonstrated the extreme vulnerability of tomato to branched broomrape parasitism, 2) broomrapes seem likely to rapidly establish and spread in California because of the similarity to the species’ native climate, (3) repeated cultivation of processing tomato in the same fields, (4) the cultivation of a wide range of hosts (e.g. carrot, sunflower, safflower) in California, (5) intensive agricultural practices that could rapidly spread broomrape seeds to uninfested fields, (6) the production of copious number of minute seeds could easily disperse via machinery and irrigation water in the highly mechanized and irrigated cropping systems of California, (7) seed longevity (> 20 years) allows the parasite to persist even in the absence of any hosts, and (8) the major part of the parasite’s lifespan occur underground, making it inaccessible to conventional means of weed control such as cultivation and contact herbicides, (9) some of the important management tools (e.g. herbicides known to be effective in controlling broomrapes) are not yet registered or tested in California, (10) regulatory and environmental challenges with soil fumigation practices.

    Research efforts are currently being made to further understand, and develop detection and control approaches for branched broomrape in tomatoes and other specialty crops in California. For more information about branched broomrape in California, please see:

    http://tomatonet.org/branchedbroomrape

    http://tomatonet.org/img/uploadedFiles/Broomrape/CTRI_2019_NEWSLETTER.pdf

    https://www.plantsciences.ucdavis.edu/news/broomrape-eradication-high-priority-uc-researchers

    – Article By O. Adewale Osipitan, Brad Hanson, Matthew Fatino & Mohsen Mesgaran (UC Cooperative Extension)

  • CA Squash Delights Meals All Year

    Summer Squash Harvest at Frontyard Farms

    Whether you grow it, grind it into other forms or just enjoy it at mealtime your choice of squash from California is almost without limits.  Florida is the only state that produces more squash than California, but a half dozen other states produce it commercially.

    Production in Mexico has increased steadily, competing primarily with growers in the Coachella Valley for the early spring market.  The Central San Joaquin Valley is a major producer, mostly of the spring and summer varieties, with large volumes coming from the Stockton area and from the Salinas Valley as summer progresses.

    As any backyard gardener knows, seed packets of dozens of squash varieties are at your fingertips, and squash plants grow heartily and produce generously in about 60 days after planting.  Along with radishes squash plants are about as sure a bet as home gardeners can make in early summer, practically guaranteed to produce enough to share with a neighbor.

    But even a small backyard planting attracts hungry, and sometimes large and ugly, insects, that demand control measures if the vegetable is to grow to tasty maturity. Probably more than any other vegetable, squashes provide home gardeners an experience closer to those of experienced professional producers than any other food commodity.  Weather, irrigation demands, insect attacks and harvest determinations are comparable at whatever level or volume the vegetable is grown. In a 12-foot row of squash behind the house a homeowner will perform about the same duties as a commercial grower tending acres of squash, and at about the same time.

    Ratatouille made with Summer Squash from Frontyard Farms in Fresno, CA

    For those who appreciate squashes only for meal preparation and enhancement the passing parade of varieties at their supermarkets or vegetable stands is an assuring feature.  Part of the delight is in the variety of colors and shapes that squashes present, from crisp green to deep reds and purples, and shapes that stretch from banana-like to circular and bulbous.

    To isolate on just one of the many squash varieties, butternut, provides ample interest and intrigue.  A colorful winter variety, butternut squash is technically not a vegetable, but a fruit. It is not only tasty, but heavily endowed with vitamins, minerals, fiber and antioxidants, but low in calories.  Preparation commonly involves roasting or baking.

    Research has shown that diets high in certain antioxidants such as those found in butternut squash can reduce the risk of certain cancers. Studies have demonstrated that a higher dietary intake of beta-carotene and vitamin C may reduce lung cancer risk.  Butternut squash contains high levels of both.

    Mixed Summer Squash at Frontyard Farms’ Produce Stand in Fresno, CA

    Those thinking about weight loss – and that seems to include almost everybody these days – can be encouraged that a cup of cooked butternut has only 83 calories, and provides seven grams of filling fiber, making it an excellent choice for those concentrating on losing excess weight and body fat.

    Aside from all the appeal to health and weight-loss enthusiasts most of the squashes grown commercially are relatively easy to pack and ship.  They are not easily bruised or otherwise damaged in the harvest and packing mode, and commonly arrive at their commercial destinations undamaged and ready to display.  Their color and freshness seem to appeal to shoppers without their being dressed up or polished.

    Don Curlee

    One Central California grower and shipper of a large volume of squash for most of every year said he expects recent virus and health concerns to not be focused on the popular vegetable.  Rather, the health benefits of those in the squash family might receive increased attention in the months ahead.  Quick! Get those seeds in the ground. – By Don Curlee, Ag at Large

  • Does Adjusting Soil pH Control Clubroot of Brassicas?

    Typical clubbing of broccoli roots

    Clubroot disease  can be a serious production issue for broccoli, cauliflower, and other brassicas in the Salinas Valley. The disease  is caused by a unique organism (Plasmodiophora brassicae) that is closely related to ciliate protozoans but is classified in its own taxonomic group. It survives over 20 years as resting spores in the soil that are released as the clubbed root tissue decays. At temperatures above 65 °F, the resting spores release zoospores that swim to host plant roots and infect through root hairs. Once inside the plant, the organism grows into a large multinucleate plasmodium (a multinucleate mass of protoplasm) which stimulates changes in the plant hormones, resulting in enlarged root cells and the characteristic clubbing of the roots (See photo Below). Root infections by the clubroot pathogen can occur in both acid and alkaline soils; however, acidic soil conditions favor the development of the root symptoms. In addition to the main brassica crops, Plasmodiophora can infect arugula, radish, mustard cover crops, and weeds such as shepherd’s purse and even some grasses. Plants that develop severe root swellings will exhibit above ground symptoms (See Photo Above) indicative of non-functioning root systems, which includes yellowing, wilting, poor growth and stunting, drying and death of lower leaves, and eventual plant death.

    Clubroot in the Salinas Valley is mostly controlled by maintaining soil pH above 7.2 to 7.3 by liming. The high pH does not kill the pathogen but inhibits the formation of the root clubs. Soils where control of clubroot by liming is achieved are called “responsive” soils. However, soils where liming is less effective are called “unresponsive” soils.

    In 2020 we had calls regarding the incidence of clubroot on brassicas. In each situation the grower/PCA had soil lab results that indicated that the soil pH was greater than 7.2. To investigate this situation, a small study was conducted. At three fields soil was collected from symptomatic and asymptomatic areas of the crop and soil pH was determined using a pH meter at the UCCE or UC Davis Analytical Lab. The results shown in Table 1 indicate that clubroot was more severe in soils with lower soil pH levels. These findings are consistent with what we know about clubroot, that higher pH soils should have less concern with this disease.

    Table 1. Three evaluations of soil pH in clubroot affected fields

    So why did clubroot occur in soils that had  test pH values greater than 7.2? It is important to keep in mind that soils have a great deal of inherent variability. The goal is to determine if the soil pH for a 5 or 10 acre field is ≥7.2. This is typically done by collecting 15 – 20 soil cores from various parts of the field and mixing them together as a composite sample. However, if sample collection by chance missed areas of lower soil pH, the lab results may be skewed to represent areas of the field that had relatively higher pH values. If this is the case, such a sample could have an artificially high pH (greater than 7.2) while some parts of the field may have a lower pH value. One way to have greater confidence in the soil pH is to collect more soil cores in fields where clubroot disease has been noted in the past.

    At present, we have not seen evidence in Monterey County that soils are unresponsive to liming or that the liming treatment is failing to control clubroot, given variability in soil pH and pH testing. In our intensive vegetable production system, soil pH tends to decrease over time through the use of ammonium fertilizers. The loss of calcium, magnesium and potassium from crop removal and leaching can also contribute to lower soil pH on lighter soils. Given the longevity of clubroot resting spores in the soil, it is important to maintain a liming program to assure that soil pHs are above 7.2 to 7.3 to thoroughly suppress clubroot throughout the field. – By Richard Smith, UCCE Vegetable Crops & Weed Science Farm Advisor, and Steve Koike, TriCal Diagnostics

  • NMSU Extension Offers Online Produce Safety Training June 29-30

    Harvesting of vegetables and fruits is beginning. Soon fresh produce will be available at growers’ markets.
     
    In preparation for providing for this season’s harvest and sales, a food safety practices course is available to growers to meet the regulatory requirements included in the U.S. Food and Drug Administration’s Food Safety Modernization Act Produce Safety Rule.

    New Mexico State University’s Cooperative Extension Service, the Southwest Border Food Protection and Emergency Preparedness Center, and the New Mexico Department of Agriculture are offering the training online from 8 a.m. to 12:30 p.m. Monday, June 29, and Tuesday, June 30. 

    “We are excited to offer New Mexico’s third remote delivery of the Produce Safety Alliance’s growers training,” said Bob Silver with the Southwest Border Food Protection and Emergency Preparedness Center. “This training is intended for New Mexico fruit and vegetable producers and importers who grow, harvest, pack or hold produce and fruit that is usually consumed raw, and who sell more than $25,000 per year.” 

    The Produce Safety Rule requires at least one supervisor or person responsible for the farm to have successfully completed food safety training in accordance with the annual monetary value of produce the farm sold during the previous three years.

    Participants who complete the course receive a certificate from the Association of Food and Drug Officials that verifies they have completed the training. The certificate is also useful for meeting buyer requirements for food safety.

    “Attendance at the training the whole eight hours is mandatory and if someone does not attend all the sessions, they will not be given a certificate or refund,” Silver said.

    NMDA is covering the cost of the manual that will be mailed directly to the participant prior to the video training. The manual is a useful reference for farm safety practices and to develop a farm safety plan.

    Registration closes at noon on June 22 to allow for postal delivery of the manuals. The link and password for the webinar will be provided upon registration. Registration fee for New Mexico residents is $45 and $90 for out of state growers. To register, visit https://aces.nmsu.edu/preparedness/psa-training.html.

    “Participants will need internet access, webcam and microphone for the session,” Silver said. 

    For details on the Zoom requirements and instructions, visit https://producesafetyalliance.cornell.edu/training/zoom/.