Survival and Development of Heliothis zea (Lepidoptera: Noctuidae) Larvae on Selected Soybean Growth Stages

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Abstract
Corn earworm, Heliothis zea (Boddie), larval survival and development on determinate cultivar soybeans, Glycine max (L.) Merrill, at plant growth stages from prebloom to bean maturation stage were tested. Larvae confined to plants established on all stages tested, although fewer established on plants at more mature stages. Mortality of later instars was low in all treatments. Larvae feeding on prebloom stage plants weighed more after 12 d than those feeding on bloom or podfill stage plants. However, larvae from podfill stages had higher pupal weights. Development rates of larvae were not significantly different for the cultivars of soybean and plant stages tested from field-grown plants, except for one ‘Forrest’ prebloom growth stage.