West Coast Nut Articles - westcoast_nut



Distribution of Chlorosis in Almond Orchards

Distribution of Chlorosis in Almond Orchards

By: Elizabeth J. Fichtner, Farm Advisor, UCCE Tulare and Kings Counties; Mae Culumber, Farm Advisor, UCCE Fresno County, Bruce Lampinen, Extension Specialist, UC Davis The first step in assessing the cause of canopy chlorosis and decline in an orchard is mapping the distribution of the symptoms. If a pattern of chlorosis is similar across irrigation lines, then the cause of the problem may be related to over—or under—watering. Two scenarios present themselves regularly during summer farm calls: a) terminal tree chlorosis, and b) within row tree chlorosis (Figures 1 and 2). Figure 1. A) Chlorosis of end tree indicates excessive...

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an arial photo done by drones

UAV Research Shows Promise

By Kathy Coatney
What do drones or UAVs, unmanned aerial vehicles, hold for the future for agriculture? Currently, there are three main uses for UAVs in nut orchards. 1. Multispectral imaging sensors that are mounted to the drone. In the past, the sensors were much larger and they had to be on a manned aircraft, then flown over an orchard. It was very expensive and could only be done a few times a year, but now there are compact sensors and growers can pilot the drones themselves. They can scan their orchards as frequently as they want for a...

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Iron Bacteria and the Problems it Creates in your Emitters

By: Cecilia Parsons, Associate Editor
A slime invasion might make for a good horror movie, but no one wants to find one in their drip emitters. Iron-loving slime bacteria can cause severe clogging in drip irrigation systems. Iron bacteria is a filamentous amorphous gelatinous type of reddish-brown slime. When the bacteria, the most common is Gallionella Sp., reacts with iron through an oxidation process, iron is changed to an insoluble form. In this form, the iron is surrounded by the filamentous bacteria colonies creating the sticky iron slime that is responsible for clogging the dripper. Sarge Green, interim director...

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fsma preventative control for the nut industry

FSMA: Preventative Controls for the Nut Industry

By: Safe Food Alliance, Contributing Writer
For our second installment in this series on the Food and Drug Administration’s (FDA) Food Safety Modernization Act (FSMA) series, we’re going to talk about the “Preventive Controls” rule, which is the main rule for food processors. It’s similar to the Hazard and Analysis Critical Control Point (HACCP), with some notable differences which we’ll address below, including some specific requirements that you may not have seen before.
Who’s Covered
In general, facilities which register with FDA under part 415 of the FD&C act (that is, food processors) have to comply with...

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pecan aphids

Insecticide Efficacy for Pecan Aphids

By: Cecilia Parsons, Associate Editor Aphid infestation and damage to pecans has become worse in the past five to six years. Mild Winters Larry Blackwell, New Mexico State University researcher and program coordinator College of Agricultural, Consumer and Environmental Sciences, said that pecan producers in New Mexico are dealing with higher aphid numbers in their pecan orchards due to lack of freezing winter temperatures in recent years. “We have had really mild winters and thus no kill off,” said Blackwell. The high numbers of aphids in pecans is the result of the climate, and not just due to population build up,...

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Nutrition

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...

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