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Pest/Disease Management

Aphid ‘honeydew’ May Promote Bacteria that Kill Them

The word ‘honeydew’ sounds benign, but the sugary waste product of aphids can promote growth of bacteria that are highly virulent to the pests, according to a new study. The research takes a step towards understanding how some strains of the bacteria Pseudomonas syringae that live on leaves and are pathogenic to aphids might one day be used to control …

Citrus Canker in Nursery Stock Sold to CA, CDFA & USDA Take Action to Identify & Destroy Affected Plants

Citrus Pest & Disease Prevention Program — The United States Department of Agriculture’s Animal and Plant Health Inspection Service (APHIS) has confirmed the presence of citrus canker disease in a nursery in South Carolina. The nursery sells plants to consumers through online sales, including four locations in California since August 2021. Retail nurseries did not receive these plants. Citrus canker causes citrus …

Fresno County Vacancy on Citrus Pest & Disease Prevention Committee

The California Department of Food and Agriculture is announcing one vacancy on the Citrus Pest and Disease Prevention Committee. The Committee advises the CDFA Secretary on activities associated with the statewide citrus specific pest and disease work plan that includes, but is not limited to, outreach and education programs and programs for surveying, detecting, analyzing, and treating pests and diseases …

Research Indicates Paint Not Effective At Protecting Young Avocados From Herbicide Drift

California Avocado Commission — While it is often common practice for fruit growers to apply white latex paint to the bottom 2 to 3 feet of young, newly planted trees in order to provide some protection from herbicide drift, researchers note there is little evidence to prove this practice is effective. A recent blog post by Dr. Ben Faber summarized the …

CA Avocado Disease Management Webinar, FEB. 16

The California Avocado Society, California Avocado Commission and UC Cooperative Extension are hosting a free online Grower Webinar: Avocado Disease Management session on Wednesday, February 16 from 9:00 a.m. – 11:00 a.m. The webinar is designed to provide growers and grove managers with information concerning management strategies for diseases that California avocado trees are prone to. The online seminar will cover: …

Spray Timing for Almond Bloom Diseases with Brent Holtz

Beekeepers have begun delivering hives to almond orchards and the buds of all varieties are swelling and prepping for bloom. Watch this brief interview with UCCE Farm Advisor Brent Holtz as he shares some important advice with growers regarding bloom fungicide spray timing, and read his monthly Almond Tasks column in Pacific Nut Producer Magazine. Please thank this video’s sponsor Trece for …

Areawide, Coordinated ACP Treatment Participation More Important Than Ever For Citrus Growers

As the threat of Huanglongbing (HLB) continues, industry members know that the best way to prevent HLB from infecting our groves is to limit populations of the Asian citrus psyllid (ACP), which spread the deadly disease. This winter, it’s critically important for California’s citrus growing operations to actively participate in local, area-wide or coordinated treatments to further boost our industry’s efforts in …

HLB Quarantine Expansion Connects Boundaries in Jurupa Valley and Riverside Areas

Effective Dec. 6, 2021, the California Department of Food and Agriculture (CDFA) has expanded the Huanglongbing (HLB) quarantine boundaries in Riverside and San Bernardino counties in the Jurupa Valley and Riverside areas to create one quarantine area, connecting parts of Orange, Los Angeles, Riverside and San Bernardino counties. A map of the boundary expansion can be found below and at https://www.cdfa.ca.gov/plant/hlb/regulation.html#maps. …

Why Sonoma County Needs a Wine Grape Pest Control District

“Napa County has a Wine Grape Pest Control District, why not other critical wine growing regions in the North Coast?” This was a topic of discussion at the recent Sonoma Grape Expo.  Vineyards are constantly threatened by invasive pests and diseases, and Jason Saling (local grower, President of the Sonoma County Vineyard Technical Group, and Chair pro Tem on the …

NIFA Invests Nearly $11M to Combat & Prevent Citrus Greening Disease

The U.S. Department of Agriculture’s (USDA) National Institute of Food and Agriculture (NIFA) announced an investment of nearly $11 million for research to combat Huanglongbing (HLB), commonly known as citrus greening disease. HLB, caused by an insect bacterium, is the most severe threat to global citrus production. “NIFA’s Emergency Citrus Disease Research and Extension program brings the nation’s top scientists …

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