Articles - West Coast Nut





Almonds being loaded for transport

Tips for Almond Harvest

By Cecilia Parsons Associate Editor

Being prepared increases the likelihood of a successful almond harvest.   Pest Control The number one concern for growers approaching harvest should be controlling navel orangeworm (NOW) in their orchards. Mel Machado, director of grower relations for Blue Diamond Growers said timing of spray applications for this pest is critical to control and minimizing nut damage due to NOW. Timing hull split sprays should be at the top of every grower’s harvest preparation checklist, Machado said. “You don’t want to be too late with your hull split sprays, you want to make sure you get good coverage.” Timing and coverage...

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Preparing for irrigation season

Drip Irrigation Isn’t Just for Young Hazelnut Orchards Anymore

By: Danita Cahill, Contributing Writer

The census is in: drip irrigation produces bigger hazelnut trees faster, more nuts sooner, and fuller, heavier kernels. With drip irrigation, hazelnut production is now possible in dry soils with low-clay content, instead of only in historically-used prime soils. “Drip irrigation is increasingly being adopted. It really has enhanced orchard establishment,” said Nik Wiman, Assistant Professor, Orchard Crops Extension Specialist at Oregon State University (OSU) Wiman Lab. “Grows trees a lot faster. We’re seeing nuts by year four.” Benefits of Drip Irrigation on Established Trees Jeff Newton, farm manager for Crimson West/Christensen Farms in McMinnville, Oregon, got in on the...

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Distribution Uniformity:

Why it Matters, What Influences it, and Improving Yours By Dani Lightle, UC Cooperative Extension Orchard Systems Advisor, Glenn, Butte & Tehama Counties

What is Distribution Uniformity? Distribution Uniformity (DU) is a measure of how uniformly water is being applied across the orchard, or whether certain parts of the orchard are receiving more water than others. It is a measure of the irrigation system. DU is a different measure than irrigation efficiency, which is a measurement of how well the applied water matches the crop water requirements. Irrigation efficiency is a measurement of how well you—the irrigator—applies a correct amount of water at an appropriate frequency. However, it is impossible to have a high irrigation efficiency without also having high distribution uniformity (Figure...

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Solar Systems in Agriculture

The Future of Solar in Agriculture

By: Kathy Coatney, Editor

There are changes coming to solar in next few years. One of the big changes is the investment tax credit.   (more…)

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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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