Walnuts Archives - Page 8 of 10 - West Coast Nut

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Walnuts



What Walnut Growers Need to Know About Nutrition

By Cecilia Parsons, Associate Editor

Because of looming state regulations meant to protect ground water sources from nitrate contamination, California growers are being asked to re-examine how the amount of nitrogen (N) they apply compares with the amount they remove from their fields. Walnut growers are no exception. In order to use this nutrient more efficiently, growers and orchard managers may need to recalculate their application rates. Cost of over application is also a concern for growers. Ongoing research by University of California (UC) and University of California Cooperative Extension (UCCE) farm advisors, funded by the California Department of Food and Agriculture (CDFA) and the...

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Key Points to Ethephon Use in Walnuts

By Cecilia Parsons, Associate Editor

Use of the plant growth regulator ethephon can be an important management tool for walnut growers who want to maximize kernel quality and minimize navel orangeworm (NOW) damage.   California walnut growers are also using ethephon to better manage their harvest timing said Dani Lightle, University of California Cooperative Extension (UCCE) orchard systems advisor based in Glenn County.   Ethephon Ethephon has a long history of usage since its discovery almost 50 years ago and Environmental Protection Agency (EPA) registration in 1973. It is one of the most widely utilized plant growth regulators in the world. Besides use in walnuts...

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1,000 Cankers Disease: Everything You Need to Know For Walnuts

By Mohammad Yaghmour, Area Orchard Systems Advisor Kern Co
and Elizabeth Fichtner, UCANR Advisor Tulare and Kings Cos

The walnut tree (Juglans sp.) is well known for its valuable wood and timber quality and its nutritious nut.  Different native species of walnut are an important part of the ecological system in North America.  Eastern black walnut (Juglans nigra) is native to eastern North America from the northeast in Vermont and southern Ontario to Minnesota and south to Florida.  It also ranges east from the Atlantic coast to central Texas except the Mississippi River Valley and Delta.  Juglans nigra has an important economic value estimated at more than $500 billion for its wood and timber alone.  Among the other...

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Blight Control in Walnuts

By Julie R. Johnson, Contributing Writer

Blight's description “as any cause of impairment, destruction or ruin,” definitely applies to Xanthomonas arboricola pv juglandis (Xaj), a pathogen of Walnut Blight and the topic of Richard Buchner's presentation during this year's annual Walnut Trade Show hosted by West Coast Nut. Buchner, UCCE Orchards Advisor, Tehama County, said walnut blight caused by Xaj can cause significant crop loss and determining an orchard's risk is often a matter of guess work. “Three things are necessary for the disease to occur,” he explained, “pathogen, host and favorable weather. This is often referred to as the disease triangle.” One of Buchner’s “take...

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Walnut & Almond Pest Management: Preparing for a Successful New Year

By Emily J. Symmes, IPM Advisor UCCE and Statewide IPM Program

With the wild ride of the 2017 growing season now behind us, January is a good time for orchardists to take stock of the key issues of the previous year and begin outlining their production and pest management activities for the upcoming season. During the dormant period, one of the most critical activities that can be done is to sit down with your orchard manager, pest/crop adviser, and your record books to review your pest management history and devise a plan-of-attack for the coming season. Heading into the season armed with lessons learned from successes and failures of previous years,...

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