West Coast Nut pest Archives - westcoast_nut



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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Approaches to Spider Mite Management in Almonds

By: Emily J. Symmes, IPM Advisor UCCE and Statewide IPM Program Spider mites are considered indirect pests in almonds, in the sense that they do not feed directly on the harvested product. Rather, they cause injury to plants by sucking cell contents from foliage. Signs of feeding injury include leaf stippling, yellowing, and dropped leaves. High populations of mites can also be recognized by webbing on leaves and tree terminals (Image 1). Significant spider mite injury can become economic crop damage in almonds in subsequent seasons in the form of reduced vegetative tree growth and crop reduction. In addition, excessive leaf...

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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...

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Managing Spider Mites in Almonds and Walnuts

By: Emily J. Symmes, IPM Advisor UCCE and Statewide IPM Program Spider mites are considered indirect pests in almonds and walnuts, in the sense that they do not feed directly on the harvested product. Rather, they cause injury to plants by sucking cell contents from foliage. Signs of feeding injury include leaf stippling, yellowing, and dropped leaves. High populations of mites can also be recognized by webbing on leaves and tree terminals. Significant spider mite injury can become economic crop damage in almonds in subsequent seasons in the form of reduced vegetative tree growth and crop reduction. In walnuts, early season...

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NOW

The Battle Against NOW and Coddling Moth

By: Julie R. Johnson, Contributing Writer How to the fight the battle against Navel orangewood (NOW) and coddling moth in walnuts was the take home message of Emily Symmes, UCCE Area IPM Advisor, Sacramento Valley, in her presentation at the West Coast Nut hosted Annual Walnut Trade Show at the Yuba-Sutter Fairgrounds on Jan. 6, 2017. “Coddling moth hit pretty hard this last harvest, as did Navel orangeworm,” she said. “A lot of people were caught a little off guard by both.” Of particular concern was damage seen in the later maturing varieties, which have historically been considered less vulnerable to...

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