California Fruit and Vegetable

Tag: The California Department of Pesticide Regulation

  • Rely® 280 Herbicide Available for Use in California Avocado Groves

    The California Department of Pesticide Regulation (DPR) has approved the herbicide Rely® 280 (glufosinate-ammonium) for use in avocado groves in California. Rely® 280 is a post-emergence broad-spectrum herbicide for use against broadleaf and grassy weeds. Glufosinate-ammonium is an excellent alternative to glyphosate, especially for those weeds that have developed glyphosate resistance.

    The California Avocado Commission provided funding for Dr. Peggy Mauk, extension professor for subtropical horticulture at the University of California, Riverside, to conduct efficacy trials with glufosinate-ammonium and the IR-4 program provided funding for the required phytotoxicity (crop safety) trials. “Glufosinate-ammonium is an effective broad-spectrum herbicide,” said Mauk. “The weed that is the biggest problem here in Riverside is mare’s tail or hairy fleabane (Erigeron bonariensis). Glufosinate will kill it depending on the application timing and size of the plants. Treating for weeds is also going to be seasonal… the spring is usually worse because spring rains bring a lot of weeds, especially this past year.”

    Currently, growers must have a copy of the DPR approved supplemental label in their possession when using Rely® 280. The DPR-approved label has a stamp on it with the wording “LABELING ACCEPTABLE State of California Department of Pesticide Regulation Pesticide Registration” and can be downloaded here. This supplemental label expires on December 1, 2025, and BASF, Rely® 280’s manufacturer, anticipates that all old product will be used by that date and new product with avocado listed on the package label will be fully in the supply chain by that date.

    Dr. Mauk’s phytotoxicity trials found minimal damage, assuming sound application practices are followed. “Spray applications should not be made when there is a breeze,” Mauk emphasized. “If the wind carries the herbicide onto the plants, there can be some leaf discoloration. The discoloration appears as occasional purple spots on the leaves. There is not widespread damage. We also never saw any discoloration on the avocado fruit.”

    General questions about this registration can be directed to CAC’s Research Director Dr. Tim Spann at tim@spannag.com or (423) 609-3451. For specific questions regarding the use of Rely® 280, growers should contact their Pest Control Advisor. — By Ben Faber, UC Cooperative Extension

  • Novel Strawberry IPM Tool Included in CA DPR Grant Funding

    The California Department of Pesticide Regulation (DPR) announced $1.78 million in Alliance Grants for five projects that aim to increase the speed and the scale at which safer, more sustainable pest management practices are adopted across the state. Each project will promote innovative Integrated Pest Management (IPM) systems and practices in agricultural, urban or wildland settings.

    “Alliance Grants directly support the department’s mission to foster methods and tools to reduce reliance on pesticides and their impact on human health and the environment,” said DPR Director Julie Henderson. “We are excited by the potential of these five projects and will continue to invest in projects that promote the development and use of safer, more sustainable pest management.”

    DPR’s Alliance Grants Program funds projects that promote IPM, an approach that uses the least-toxic, effective method to solve pest problems. Since 2007, DPR has awarded more than $7.8 million in Alliance Grants. The enhanced funds for the 2022 DPR Grants Programs cycle were allocated by the 2021-22 state budget and represent a more than five-fold increase in available funding opportunities compared to historical funding levels.

    Alliance Grants are awarded to groups of experts and partners, also referred to as Alliance Teams, who work collaboratively to accomplish the goals of a given project.

    Alliance projects funded for agricultural pest management:

    • Promoting IPM practices that incorporate natural-enemy habitat to control pest insects. This project’s Alliance Team will engage in outreach with producers and agricultural professionals through videos that feature producers and researchers, field days and webinars, which will include an online continuing education course for pesticide applicators. This project will be led by Jo Ann Baumgartner at Wild Farm Alliance, a local non-profit conservation group in Watsonville.
    • Promoting the adoption of UV-C light, a non-chemical control, by strawberry growers on California strawberry farms. This project’s Alliance Team will showcase UV-C light as an effective, non-chemical alternative to chemical pesticides for controlling mites, mildew and mold. This project will be led by Dr. John Lin at California Polytechnic State University, San Luis Obispo.

    Alliance projects funded for urban pest management:

    • Addressing management of Argentine ants, the most common nuisance ant for which pesticide treatments are applied in urban environments. The Alliance Team for this project is focused on the implementation and promotion of a low-impact IPM approach for pest management professionals that uses pheromone attractants during initial treatment visits and targeted chemical baiting for maintenance visits, to reduce reliance on repeated use of insecticide sprays. This project will be led by Dr. Dong-Hwan Choe at University of California, Riverside.
    • Home visits to provide IPM education and intervention to disadvantaged communities in South Los Angeles. To improve the health and well-being of South Los Angeles residents, this project’s Alliance Team will make home visits to each family that enrolls in the program. The team will assess housing conditions; provide IPM interventions, including caulking cracks and sealing large holes; and offer other IPM education on reducing pest infestations. This project will be led by Nancy Ibrahim at Esperanza Community Housing.

    Alliance projects funded for wildlands pest management:

    • Combining manual removal of invasive primrose with native plant restoration through a private property owner incentive program, and an AmeriCorps partnership that will provide education and outreach to the community. The Alliance Team for this project is focused on management of creeping water primrose, an invasive aquatic plant, that is usually controlled with chemical pesticides. This project’s combination of IPM methods will improve water quality, protect fish habitat and enhance flood protection and prevention, as well as create strong and sustainable natural vegetative wetland communities around the shores of Clear Lake, California. This project will be led by Angela De Palma-Dow at the Lake County Watershed Protection District.For details about past recipients of DPR’s Grants Programs, please visit our department’s Pest Management Grants webpage.ABOUT THE DEPARTMENT OF PESTICIDE REGULATION

      The California Department of Pesticide Regulation protects human health and the environment by fostering safer and sustainable pest management practices and operating a robust regulatory system to evaluate and register pesticides and monitor and regulate their sale and use across the state.

      DPR’s work includes conducting scientific evaluations of pesticides to assess and mitigate potential harm to human health and the environment prior to and following registration registering all pesticides prior to sale or use in California, monitoring for pesticides in the air and water, and enforcing pesticide laws and regulations in coordination with 55 County Agricultural Commissioners and their combined 400 field inspectors across the state’s 58 counties. DPR invests in innovative research, outreach, and education to encourage the development and adoption of integrated pest management tools and practices and conducts outreach to ensure pesticide workers, farmworkers and local communities have access to pesticide safety information.