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Fig. 1. Differences in forage quality of potato leafhopper resistant vs. susceptible alfalfa cultivar groups for individual harvests of control (no insecticide applied) and treated (insecticide applied) plots at four locations in 1996 and 1997. Each bar represents the magnitude of the resistant susceptible group difference for an individual harvest. CP, crude protein; NDF, neutral detergent fiber; IVDDM, in vitro digestible dry matter; *, the difference between the resistant and susceptible group mean was significant at P 0.05. , first harvest in 1996 at Minnesota was not sampled for forage quality.
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