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This research aimed to discriminate antibiosis-type resistant soybean genotypes to Diabrotica speciosa (Germar, 1824). Six soybean genotypes were used, according to previous selection, which were: IAC 100, BRSGO 8360, IGRA RA 626 RR, DM 339, PI 227687 and PI 274454. A completely randomized design was adopted, with six treatments and 10 replicates. Each replicate was constituted by 10 soybean plants and 10 D. speciosa larvae, in the initial infestation, doubling the number of plants in the transferring, 10 days after the initial infestation, using fine-grained vermiculite as substrate. In this experiment, the following characters from D. speciosa were assessed: Number of males, females and total of emerged insects, total survival (percentage), sex ratio, male and female weight (mg), larva to adult period and longevity (without food). The genotypes DM 339, PI 274454, and PI 227687 show antibiosis resistance against D. speciosa.

Antibiosis resistance of soybean genotypes to Diabrotica speciosa (Germar, 1824) (Coleoptera: Chrysomelidae)