Mechanisms of Resistance in Soybean ( Glycine max [L.] Merrill) Genotype PI171444 to the Southern Green Stink Bug, Nezara viridula (L.) (Hemiptera: Pentatomidae)

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Abstract
Possible mechanisms of resistance to N. viridula in soybeans ( Glycine max [L.] Merrill), genotype PIl71444, were examined. Antibiosis was evaluated through fifth stadium and whole-life rearing of nymphs on pods of field and greenhouse-grown plants. Newly emerged adults reared on PIl71444 weighed less than those reared on ‘Davis,’ although there were no differences in the length of developmental time or mortality. There were no differences in the number of feeding sheaths deposited by adults in greenhouse no choice and laboratory choice tests with pods. However, females consistently chose ‘Davis’ over PI171444 in laboratory choice tests with leaves and pods, suggesting nonpreference for PI171444. Nonpreference, antibiosis, and temporal separation are discussed as mechanisms contributing to the high resistance to stink bugs previously reported for PI171444 in the field.

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