Kelly Seuhs, Associate Extension Specialist, Entomology & Plant Pathology OSU — Increasing population densities of grasshopper in pasture and field crops, including alfalfa, have been observed. Figure 1: Nymph to AdultFigure 2: DifferentialFigure 3: Two-striped FigureFigure 4: Red-legged At this time of year, development is mostly in the first to third instar making now a good time to evaluate control options. Producers should not wait until grasshoppers have reached the winged adult stage in early to mid-July, when control is more difficult (Fig. 1). As winged adults, grasshoppers are more mobile and able to fly long distances searching for food.…

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