Articles - West Coast Nut



The Ins and Outs of Pistachio Nutrition

The Ins and Outs of Pistachio Nutrients

By Cecilia Parsons, Associate Editor

Think of the nutrients in orchard soil as a ‘bank balance.” Tree roots access the ‘money’ in the soil, using water and oxygen as their passbook.   In a presentation at the 2017 Pistachio Short Course, University of California (UC) Davis plant scientist Patrick Brown explained the basics of plant nutrition including how nutrients are acquired by plants and the when and where of tree nutrition—basic principles necessary to crop production.   Nutrition 101   Nutrients are taken up in water only by active roots on trees with leaves. While the size of the nutrient pool is the bank balance,...

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Key Points to Ethephon Use in Walnuts

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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Nutrient Management of Zinc in Pistachios

By Sabrina Hill, Contributing Writer

Zinc is among the most likely deficient micronutrients for pistachios in the California growing areas, but there are ways for growers to monitor, prevent, and treat low zinc levels in the orchard. As summer progresses, growers should be considering leaf sampling to check for zinc deficiency in the orchard.   Author’s note: Information herein was collected from scholarly papers and presentations by University of California (UC) advisors Bob Beede, Brent Holtz, and Craig Kallsen.   Importance of Zinc Zinc is necessary for formulation of Auxin, which plays a role in cell elongation and the forming of chloroplast. It is...

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Nitrogen Calculator Optimizes N Use

By Almond Board of CA, Contributing Writer

Under the Irrigation Lands Regulatory Program (ILRP), Central Valley Water Quality Coalitions’ reporting requirements include farm evaluations, nitrogen summary reports, and a sediment and erosion plan. In high-vulnerability groundwater areas, growers are required to submit certified summary reports annually; in low-vulnerability areas, the report must be kept on-site and certification is not required.   It is important to comply with these requirements, as the Central Valley Regional Water Board is actively enforcing the program with heavy fines for growers who either have not signed up for a coalition or who have not submitted a Nitrogen Management Plan.   N Calculator Almond...

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Best Management Practices for Fungal Disease in Almonds

Best Management Practices for Fungal Disease in Almonds

By Cecilia Parsons, Associate Editor

Fungal disease management in almonds requires year-round vigilance.   The overall process for integrated pest management of fungal diseases calls for knowledge about the life cycle of the disease, the crop and environmental triggers.   Emily Symmes, University of California Cooperative Extension (UCCE) Integrated Pest Management (IPM) advisor in the Sacramento Valley,  said actively assessing all stages of a fungal disease, monitoring and tracking weather patterns will help growers be proactive in disease management.   Speaking at the Mid Valley Nut Conference in Modesto, Symmes noted one more key components of a good IPM program is evaluation of fungicide treatments...

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Everything you Need to Know About Thousand Cankers Disease of Walnuts

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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