Newsletter Archives - West Coast Nut

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UC Almond Variety Trials Reveal Clear Result


UC researchers plan to plant a new set of regional variety trials for almonds, adding to the growing breadth of information available to growers about yield, kernel quality and growing characteristics of new and experimental varieties of almonds. In 2014, UC, with funding from Almond Board of California, embarked on a project to evaluate new and experimental varieties produced from UC Davis, USDA and commercial California nurseries. 29 varieties are being tested side-by-side in replicated field trials planted in Madera, Stanislaus and Butte counties. In Madera County, trees are on Hansen 536 rootstock and planted at a 12’ x 21’...

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Help on the Way for Nut Export Supply Chain Issues


Ocean carriers, eager to exploit U.S. demand for imports over the last couple years, rushed empty containers back to Asia rather than filling them with exports, including California nuts. As a result, California handlers and growers missed important export windows for their almonds, walnuts and pistachios and lost an estimated $2 billion in revenue. Now, a historic new industry effort has led to solutions to address this inequity as well as other ongoing supply chain issues in order to move nuts in the coming year. The collaborative private public venture has been dubbed the “Central Valley Ramp” shipping solution, which...

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Squirrel Control Requires Multiple Strategies


Understanding the biology and ecology of vertebrate pests will guide management decisions. In a UC IPM webinar, Dr. Niamh Quinn, UCCE Human-Wildlife Interactions Advisor at the South Coast Research and Education Center, noted that the ground squirrel and Belted ground squirrel were the two main squirrel species in California that were pests in agriculture including tree nut crops. The ground squirrel was likely to be the more prevalent of the two in Central California where it not only eats tree nuts, but also girdles trees, chews irrigation lines and creates problems with burrows in orchards. Knowing which species is affecting...

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LFB Pheromone Efforts Show Promise


A multi-year effort to identify and isolate compounds to make up the leaffooted bug pheromone in order to better monitor this pest has produced promising results for the almond and pistachio industries. Researchers Jocelyn Millar (UC Riverside), Houston Wilson (UC Riverside) and Kent Daane (UC Berkeley) have identified and synthesized the nine compounds that make up the LFB pheromone, and preliminary field trials have shown that the pheromone lures can successfully attract LFB adults. The aim is to now determine the most effective blend of compounds as well as develop pheromone production methods that are cost effective. “We need to know...

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Step-By-Step Diagnosis of Tree Disorders


It takes critical evaluation of the tree and the environment to correctly diagnose disorders in an orchard. In a presentation for the virtual 2020 UC Pistachio Production Short Course, Richard Heerema, New Mexico State University Extension pistachio and pecan specialist, outlined a step-by-step guide to field diagnostics. The process is meant to determine the cause of an abnormality and requires a team effort that includes the grower or farm manager, extension advisors and diagnostic clinic. The list of biotic causal agents includes fungi, bacteria, viruses, phytoplasma, nematodes and insects and mites. Abiotic causes of tree disorders include soil moisture extremes,...

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