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The tobacco budworm (Heliothis virescens) is a polyphagous species that damages soybean crops. In the search for sustainable pest control methods, the objective of this study was to evaluate H. virescens non-preference (antixenosis) of soybean cultivars by examining larval attraction and feeding responses to the nine cultivars. At 45 days after planting, the attraction and feeding tests were performed with third-instar larvae, and the number of larvae attracted to leaf disks, their leaf consumption, and an attractiveness index were determined in free-choice and no-choice tests. For the free-choice attractiveness test, arranged in a randomized block design with 10 replications were performed. For the no-choice attractiveness test, a completely randomized design with 20 replications was adopted. The cultivar NK 7059 RR was the most attractive and consumed, showing susceptibility to H. virescens. The cultivars IAC 100 and M 7110 IPRO (Bt) showed non-preference-type resistance These latter cultivars can be used by soybean producers or plant breeders as donors of resistance genes in plant improvement programs for resistance to H. virescens. Received 30 Sep 2016; Revised 11 March 2017; Accepted 15 March 2017.

Attractiveness and non-preference of soybean cultivars to Heliothis virescens (Lepidoptera: Noctuidae) feeding