Pest description and crop damage The Colorado potato beetle (Order Coleoptera: Family Chrysomelidae) is a yellow and black striped beetle, about 0.5 inch long and 0.25 inch wide. It is a pest of Solanaceous crops. Larvae are reddish orange, with two rows of black spots on each side. They lay yellow egg clusters usually on the underside of potato leaves. Adult and larvae can cause complete defoliation of potatoes and nearly complete crop loss if allowed to reproduce unchecked. Larvae are more voracious than adults, feeding up to 40 sq cm of leaves or green potato tissue. East of the Cascades, they can be found feeding on hemp. No scouting or thresholds needed since this is a sporadic insect present on hemp.
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