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Research Bulletin (Iowa Agriculture and Home Economics Experiment Station)

Abstract

The potato leafhopper (Empoassca mali, LeB) is the most serious insect pest affecting the potato crop in Iowa, and probably in the Mississippi valley. Thru its feeding activities, it produces a pathological condition in the leaves of many of its host plants which is characterized by a distortion of the leaf veins, especially near the tip and a yellowing of the tissue supplied by them around the margin and at the tip. Often this yellowing is followed by a necrosis of the leaf tissue. Especially is this true on the potato and with this plant the burning is accompanied by a rolling upward and inward of the leaf margin.

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