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Pest/Disease Management

The Good and Bad Uses of Biomass for California

Conversion to Biofuels Good for Air Quality and Climate Policies As California works to meet climate and air quality goals, a key to the transition will come from biomass, which is renewable organic material from plants and animals. New research from the University of California, Davis, published in the journal Global Change Biology Bioenergy, examines the good and bad uses …

Detection of Deadly Citrus Disease Triggers Quarantine in Ventura County; First HLB Detection in County

The California Department of Food and Agriculture (CDFA) has declared a quarantine in Ventura County following the detection of the citrus disease Huanglongbing (HLB), or citrus greening, in two citrus trees on one residential property in the city of Santa Paula. These detections are the first HLB-positive trees in Ventura County. CDFA is working with the United States Department of …

Solving the Mysteries Behind the World’s Most Widespread Zoonotic Disease

Leptospirosis is a serious zoonotic disease that affects both animals and humans. This bacterial disease is commonly spread through the urine of infected animals and rodents, including wildlife and livestock such as cattle and swine. Humans can contract leptospirosis by having contact with water (such as by swimming, rafting, or kayaking) or soil that has been contaminated by urine or …

Minimize Potential Sudden Autumn Freeze Damage in Walnut

Damage from a sudden autumn freeze can occur when trees experience freezing temperatures prior to going into dormancy. With sudden autumn freeze damage occurring in three of the last five years, preparing for these freeze events needs to be a regular part of every walnut grower’s summer and fall orchard operations. The best approach to escape damage from a fall …

Confirmed CLas-positive Asian Citrus Psyllid Found in Ventura County

Citrus Pest & Disease Prevention Program — A Candidatus Liberibacter asiaticus (CLas)-positive Asian citrus psyllid (ACP) sample has been collected from a residential property in Ventura County in the Santa Paula area and has been confirmed by the Citrus Research Board’s Jerry Dimitman Laboratory. The positive sample – comprised of 12 adult psyllids from a residential citrus tree in the Southwest area of …

DPR Releases Draft Strategic Plan, Reflecting Sustainable Pest Management Approach

The Department of Pesticide Regulation (DPR) is updating its strategic plan with action-oriented, measurable goals to guide priorities over the next five years. Released today for public feedback, DPR’s draft 2024 Strategic Plan lays the groundwork for a streamlined, transparent, accountable department that centers its work around human health, equity and environmental justice, broad environmental protections, support for agriculture and …

State Reaches Settlement with Major California Pesticide Applicator

The California Department of Pesticide Regulation (DPR) announced it reached a settlement with a major agricultural pesticide-application business regarding numerous violations of state law that endangered workers and the public. In November 2022, DPR initiated a licensing disciplinary action against TriCal Inc., one of the state’s largest agricultural pesticide applicators and the largest single applicator of 1,3-D. The pesticide 1,3-D has …

California Table Grape Growers Estimate 25 Million Boxes Lost to Hurricane

Hurricane Hilary delivered wind and rain to many of California’s table grape vineyards at peak harvest time for most of the 90 varieties grown in the state. The immediate aftermath of the hurricane brought additional rain and humidity to many growing areas, compounding problems and loss. “The impact of the hurricane and its aftermath is devastating and heartbreaking,” said Kathleen …

California Funds Nearly $1M in Grant Projects for Adoption of Sustainable Pest Management

The California Department of Pesticide Regulation recently announced funding for three Alliance Grants to increase the speed and the scale at which safer, more sustainable pest management is adopted across the state. This year, DPR is investing more than $957,000 to fund three projects focused on pest management in affordable housing, and specialized training for urban and agricultural pest management …

California Growers Face High Mildew Pressure, Delayed Grape Harvest

It’s been a while since California growers have experienced a wet year with a plentiful snowpack and water supply.  Weather conditions this season, though, have pushed harvest back for most grape growers and powdery mildew pressure has been unusually high for growers that didn’t stay on their spray programs with just the right timing.  Watch this brief interview with UCCE …

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