Pest Archives - Page 6 of 7 - West Coast Nut

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Pest



An IPM Approach to Vertebrate Pests

By Cecilia Parsons | Associate Editor

They don’t look that destructive in Disney movies, but vertebrate pests in almond orchards can drive growers and managers nuts. Vertebrate pests run the gamut from coyotes to ground squirrels, to voles and even roof rats. Depending on the species, they can cause yield losses by feeding on nuts, pose food safety issues in the orchard, and damage irrigation lines. Their burrows can slow harvest, damage equipment and pose safety hazards for workers and livestock. Some vertebrate species can also transmit diseases to humans. Vertebrate Pest Pressure Roger Baldwin, a University of California Cooperative Extension (UCCE) specialist in the...

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Expanding your NOW Toolbox

By Kathy Coatney | Editor

Overall the first flight of navel orangeworm (NOW) has been lighter than normal this year. This could be attributed to relatively low 2018 damage levels, especially in pistachios, and the cooler, wetter weather during the 2019 spring. “If we get really warm sustained temperatures early in the spring, navel orangeworm wakes up early and becomes active,” according to David Haviland, University of California Cooperative Extension (UCCE) entomology farm advisor for Kern County. But this spring was cooler, overcast and wet, so the first flight was more spread out than normal, Haviland said. NOW Damage “Damage last year in almonds was...

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A Few Arthropod Pests to Consider on Establishing Pistachio Trees

By Kris Tollerup, University of California Cooperative Extension Area-wide IPM Advisor, Kearny Agricultural Research and Extension Center, Parlier, California

The University of California (UC), Pest Management Guidelines provide recommendations for managing approximately 14 insect and mite pests on pistachio. A few of those pests, growers and pest control advisers (PCAs) should pay close attention to during the first few years while young trees establish. According to the National Agriculture Statistic Service, the industry in California has expanded by about 35 percent between 2010 and 2017 from roughly 215,000 to just over 329,000 acres. New plantings in that period ranged from 6,730 (2010) to 24,500 (2013), with acreage expanding by 18,000 in 2017. With so many acres of new pistachio...

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Update on Sterile Insect Program for Control of Navel Orangeworm

By Houston Wilson, Asst. Coop. Extension Specialist, Kearney Ag. Center, Dept. Entomology, UC Riverside
and Chuck Burks, Research Entomologist, USDA-ARS, San Joaquin Valley Agricultural Sciences Center

Sterile insect technique (SIT) makes use of large numbers of sterile insects which are released into wild populations as part of an area-wide integrated pest management (IPM) control strategy. Insects are typically mass-reared in a controlled environment and then ionizing radiation (e.g. x-rays, gamma rays) is used to induce genetic mutations that lead to sterility. The basic idea is that introduction of sterilized individuals into the wild population will limit the successful reproduction of wild individuals and lead to an overall reduction or even eradication of the target pest population (Knipling 1955). Mating with sterile individuals can reduce populations by...

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Mating Disruption: A Crucial Tool for Nut Growers

By Kathy Coatney Editor

Mating disruption for navel orangeworm (NOW) has been widely tested throughout California with numerous research studies, and peer-reviewed research has demonstrated its efficacy. Mating disruption is a very simple process. Females emit pheromones, males use those pheromones to find the female. If an orchard is flooded with artificially produced pheromone the entire orchard smells like a female and the males struggle to find the real females. If they don’t find each other, they don’t mate, and if they don’t mate there are no eggs, no larvae, and less overall nut damage.   Mating Disruption in Almonds and Pistachios Navel orangeworm...

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