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D.W.A. Hunt, A. Liptay and C.F. Drury

Host plant selection by Colorado potato beetle [Leptinotarsa decemlineata (Say)] was examined on tomato [Lycopersicon esculentum Mill.] transplants fertilized with varying N, P, and K concentrations during greenhouse production. In choice tests conducted with beetles in the field and the greenhouse, the insect preference for plants increased with increasing leaf tissue N concentration, but P and K concentrations had no effect. Five-day, seedling acclimatization to outdoor spring temperatures before planting reduced the insect preference for plants.