West Coast Nut Articles - westcoast_nut



Mating Disruption: A Crucial Tool for Nut Growers

By Kathy Coatney   Mating disruption for navel orangeworm (NOW) has been widely tested throughout California with numerous research studies, and peer-reviewed research has demonstrated its efficacy. Mating disruption is a very simple process. Females emit pheromones, males use those pheromones to find the female. If an orchard is flooded with artificially produced pheromone the entire orchard smells like a female and the males struggle to find the real females. If they don’t find each other, they don’t mate, and if they don’t mate there are no eggs, no larvae, and less overall nut damage.     Mating Disruption in...

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Managing and Controlling Canker Diseases in Almonds and Walnuts

By: Cecilia Parsons | Associate Editor
Options to control Botryospaeria (BOT) diseases in tree nut crops include good sanitation and cultural practices to reduce the amount of inoculum in the orchard.   University of California plant pathologist Themis Michallides covered the range of BOT diseases that affect walnut, pistachio and almond trees and how growers can reduce infection at the South Valley Nut Conference in Tulare.  

Panicle and Shoot Blight of Pistachio

Panicle and Shoot Blight of pistachio was discovered in 1984 in a commercial orchard in northern California and has become a disease of major importance. Buds...

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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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