California Fruit and Vegetable

Tag: California Citrus

  • Citrus Season Update

    Citrus growers in California are seeing an early bloom with unprecedented warm weather, and are experiencing challenges with tariffs and trade issues. However, the mood remains optimistic. Julia Inestroza, Board Chair for the California Mutual, spoke with Matthew Malcolm of California Ag Network to discuss the growing season at the California Citrus Showcase in Visalia. Watch this quick video and read more in California Fruit & Vegetable Magazine.

    Please thank this video’s sponsor Simplot for their industry support.

  • Using Predators to Counter Asian Citrus Psyllids

     

    The Asian citrus psyllid is an active threat for growers and the main vector for Huanglongbing disease. These invasive insects have wreaked havoc in Florida and spread to Southern California, but researchers at UC Riverside are finding ways to counter them. Matthew Malcolm from Malcolm Media Ag Publishing interviewed Bodil Cass at the World Ag Expo to discuss the use of predators against psyllids. Watch this quick video and read more in California Fruit & Vegetable Magazine.

    Please thank this video’s sponsor Simplot for their industry support.

  • Dr. Beth Grafton-Cardwell to Retire – Her View on 30 Years of Citrus IPM

    Through the years I have had many collaborators and numerous technical staff studying a wide variety of pests including California red scale, citricola scale, cottony cushion scale citrus cutworm, katydids, earwigs, Fuller rose beetle, citrus peelminer, citrus leafminer, citrus thrips, citrus red mite, snails, ants, aphids and Asian citrus psyllid as well as their natural enemies. In the early years, the main controls for these pests were organophosphate (OP) and carbamate insecticides. The initial research goal was to get these replaced with more selective insecticides that would allow natural enemies to participate in pest management. We successfully documented OP resistance in California red scale and citrus thrips and developed replacement insecticides that created a more balanced situation resulting in a reduction in pesticide use (as few as 4 treatments/year in the San Joaquin Valley). But alas, citrus IPM programs must change because new situations arise. For the citrus industry, the three drivers of change in the second half of my career have been drought exacerbating some pests, export countries demanding in- field treatments for insects as a replacement for Methyl Bromide (MeBr) fumigation, and the arrival of various invasive pests. These situations have provided me ample opportunities to work with regulators and the citrus industry and challenged my creative problem-solving abilities – never a dull moment.

    It is hard to say if the past 8-9 years of higher temperatures and on and off drought conditions are a permanent ‘climate’ change or are part of a cycle. However, they have certainly made California red scale more difficult to control. Growers have shifted from treating for California red scale once every other year to treating 3-4 times per year. Extra heat units have added an extra generation of scale per year and occasionally allowed scale development in winter. My research response has been to study and provide outreach on the use of California red scale pheromone disruption as an assist to reduce insecticide treatments. I am encouraged to hear reports of some acreage going back treatments every few years for California red scale.

    Export issues with S. Korea (Fuller rose beetle and California red scale) and with Australia and New Zealand (bean thrips and mites) began to crop up in the 2010s. In the past, shipments from California would be inspected at destination and, if there were any insects or mites of phytosanitary concern, the fruit would be fumigated with MeBr. With the worldwide reduction in MeBr use, there is now the expectation that California growers apply in-field treatments to eliminate these pests so fumigation at destination is not necessary. Complete disinfestation of an orchard is impossible to achieve so we launched studies on alternative fumigants and cold treatments that could be applied in California or during transport.

    Invasive pests such as glassy-winged sharpshooter, Diaprepes root weevil, citrus leafminer, and Asian citrus psyllid have been arriving regularly into California since about 2000. In each case, I evaluated chemical and biological controls, evaluated the level of damage they could inflict and conducted outreach to prepare the citrus industry. Of course, Asian citrus psyllid has been the most significant invasive pests because of its ability to transmit the bacterium that causes the deadly disease huanglongbing. My role has been to develop control strategies for growers around the state and assist them with their psyllid management programs.

    If I had to list the top three favorite projects of my career, they would be the following:

    1. Working with colleagues to survey 13 crops around the state to see what species of predatory mites are found and developing a ‘Key to the Phytoseiid Predatory Mites of California Crops’ (submitted for publication with UC ANR).

    2. Working with cottony cushion scale and predatory vedalia beetle and figuring out how to protect the vedalia from insect growth regulators by careful timing of the application of those pesticides. This is a great example of making an incompatible insecticide compatible with a sensitive natural enemy.

      3. Directing five technicians to scout 224 commercial citrus orchards around the state and see how grower applied pesticide treatments affect the psyllid populations. The results of this project led to strong recommendations for eradication and areawide psyllid treatment programs.

      For the past 14 years, all of this was accomplished while also acting as Director of the Lindcove Research and Extension Center. That position also had challenges with hiring and directing personnel, building facilities such as a laboratory, a greenhouse and a screenhouse structure, and attracting research and extension programs to the Center. It has been very rewarding to see the Center expand its capacity and reputation.

      Finally, I couldn’t have done any of this without the amazing technical staff and collaborators that have supported my projects for many years. I will miss the challenges of this job, but I expect to dip back in when needed at Lindcove and I look forward to new life challenges as I spend more time with my family and my community. 

  • California Citrus Mutual Appoints Casey Creamer as President/CEO

    CCM appoints current Executive Vice President and veteran agriculture industry representative.  Current President, Joel Nelsen to step down after 37 years at the helm and assume new role within the organization.

    Joel Nelsen Steps Down After 37 Years of Dedicated Service as President of the California Citrus Mutual

    The California Citrus Mutual (CCM) Board of Directors has named current Executive Vice President Casey Creamer as its new President and CEO effective February 1st.  Creamer came to CCM last February after a national search process to eventually assume the role of President.  He succeeds Joel Nelsen, who has guided CCM for the last 37 years.

    “The citrus industry is very fortunate to have had an individual of Joel’s caliber the last 37 years.  That kind of loyalty is not only rare, it’s unheard of,” stated Board Chairman Curt Holmes.  “Joel has taken a relatively small industry and has given us a huge voice.  We’ve faced many challenges over the years and have addressed them head on with his energy and passion leading the way.  We are incredibly grateful to him for his service and we appreciate his willingness to stay engaged in the industry.

    “We are also very excited to have Casey on board as our new President and CEO,” continued Holmes.  “The Board conducted an extensive search process and interviewed viable candidates from across the country.  We ultimately found the right person in our own backyard.  His prior experience working for a sister commodity organization and his work representing growers on water issues made him an ideal selection.  Over the last year his knowledge of the citrus industry has greatly expanded and he has quickly become a valuable member of the CCM team on behalf of the industry.”

    “I’m humbled by the opportunity to serve,” stated Creamer.  “I’ve been extremely fortunate to work with some of the best leaders over my career and have nothing but respect and admiration for the job that Joel has done advancing issues important to the citrus industry.  I’m looking forward to carrying on the many successful traditions at CCM, while constantly seeking new ideas and pathways to address the significant challenges we face.  With the enthusiasm and commitment that exists in this industry, I am confident that together we tackle any obstacle thrown our way.”

    About CCM – CCM is the only advocacy organization representing CA citrus growers on the economic, regulatory, and political issues that impact them most. We are a voluntary, non-profit trade association dedicated to enhancing the sustainability of the CA citrus industry by advocating for sound, reasonable policy that allows for fair competition in the market place. Our 2,500 members represent 75% of California’s 320,000 acre, $3.8 billion citrus industry.