Summary
We studied the influence of diet composition and breadth on the subsequent acceptability of three novel plants to sixth instarSchistocerca americana. Rearing diets of equal breadth differing in composition, and diets differing in breadth, significantly altered first meal length on some but not all of the test plants. These effects on palatability altered and at times reversed the palatability hierarchy of insects reared on different diets. The effects of rearing insects on broad diets were not produced by exposure to the plant odors alone, but apparently required contact with a diversity of plants while feeding. Switching diets for 24 h prior to testing did not alter preferences induced by rearing diets. The relationship of these patterns to induced preferences in other insects, and some possible mechanisms for generating induced preferences, are discussed.
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Howard, J.J., Bernays, E.A. Effects of experience on palatability hierarchies of novel plants in the polyphagous grasshopperSchistocerca americana . Oecologia 87, 424–428 (1991). https://doi.org/10.1007/BF00634601
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DOI: https://doi.org/10.1007/BF00634601