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Northern Prairie Wildlife Research Center

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Caterpillars of Eastern Forests

Walnut Caterpillar (Datana integerrima)

JPG-Photo of Walnut Caterpillar

Charcoal body densely vested with white, downy hair of 2 lengths. Thin stripes variably expressed: middorsal and 2 subdorsal stripes often absent in last instar, most individuals with broken subspiracular line. Prolegs often reddened. Occasionally reported as a pest. Food: many trees and shrubs, but especially hickories and walnuts. Caterpillar: May to September; up to 3 generations in South; 1 in North.

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