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Leaf disks of tomato, Lycopersicon esculentum Mill, and L. hirsutum C. H. Mull, subjected to feeding by the Colorado potato beetle, Leptinotarsa decemlineata (Say), were altered by insect age, sex, moisture level, and plant age. Feeding response was altered by temperatures of 21.1°C or 26.7° in young adult beetles, but not in larvae or older adults. Resistance to feeding by the insect was found with L. hirsutum lines PI 134417 and PI 134418.
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Schalk et al. (1976) studied this question.
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