Newsletter Archives - Page 2 of 42 - West Coast Nut



Avoid Stress to Protect Spur Health

Maintaining a healthy spur population in an almond orchard will require careful irrigation timing and good tree health from hull split through September. While it may be a challenge for some growers to apply water in their orchards postharvest, that is one of the keys to a healthy spur population in the orchard. Water stress postharvest affects spurs. the tree’s fruit producing structures, reducing bloom numbers and fruit set the following year. It also results in reduced carbohydrate development, meaning the tree will have less energy for flower development. Sebastian Saa, Almond Board of California’s associate director of agricultural research,...

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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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