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Corn
Flea Beetles can physically damage
seedling corn by chewing long lesions in the leaves. These feeding lesions run
parallel to the leaf veins and they first appear as thin, silvery or white
streaks. Heavily injured leaves turn brown and wilt. The insect also can
transmit Stewart's
wilt, also called Stewart's disease. This disease can be
controlled on susceptible corn by controlling the corn flea beetle with an
insecticide. Use the following thresholds: in field corn prior to stage V5, 50
percent of plants with severe feeding injury and 5 or more beetles per plant; in
seed corn on susceptible inbreds, 10 percent of the plants with severe feeding
injury and 2 or more beetles per plant.
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