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potato-whitefly-3L

Immature whiteflies (nymphs) are very small and difficult to see without a hand lens. Whiteflies feed on plant sap. Large populations can cause leaves to yellow and prematurely drop from plants. Whiteflies excrete sticky honeydew that will cover leaves and become colonized by black sooty mold.
Photo Source: Michael Bush, WSU Extension, Yakima, WA