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Andy Robinson

Potato Extension Agronomist

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Helping Growers Manage Potato Psyllids & Zebra Chip in the Columbia Basin of Washington State

This presentation explains efforts to help Washington’s potato industry manage potato psyllids and zebra chip disease. It describes a regional insect monitoring program and pest alert system in the Columbia Basin of Washington. Viewers from all potato-growing regions will learn more about zebra chip disease and its vector, the potato psyllid. This includes descriptions of 1) psyllid life stages and how each can be monitored in potato fields; 2) how zebra chip is spread by psyllids; and 3) psyllid yellows disorder caused by potato psyllid nymph feeding. The presentation includes a review of zebra chip incidence in the Columbia Basin in the six years since it was first detected in the region. It also explains what has been learned about psyllid overwintering in the region and seasonal dispersal. Insecticide recommendations for managing potato psyllids and zebra chip in the Columbia Basin are described.
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