CARACTERIZAÇÃO DE RESISTÊNCIA DE CULTIVARES DE SOJA A Anticarsia gemmatalis (LEPIDOPTERA: EREBIDAE)

Abstract

Anticarsia gemmatalis (Lepdoptera: Erebidae) is worldwide distributed in tropical and subtropical regions as an important pest of leguminosas, such as: soybean, peanut, common bean, cowpea, pea, chickpea and kudzu. In soybean, the velvetbean caterpillar is an important pest due to the plant defoliation in their larval stage. The objective of this study was to evaluate soybean cultivars as source of resistance to A. gemmatalis by antixenosis (attractiveness and non-preference for feeding) and antibiosis test (biological parameters of the insect). The parameters evaluated were: antixenosis: attractiveness and non-preference, dry mass consumed and attractiveness index and antibiosis: duration of larval and pupal stages, longevity, total cycle, larval and pupal weights and larval, pupal and total viability. Considering antixenosis and antibiosis the least suitable cultivars for A. gemmatalis were found to be BRS 8383 IPRO, BRS 1074 IPRO, BRS 1061 IPRO, BRS 7180 IPRO, BRS 9383 IPRO, BRS 8980 IPRO and BRS 1003 IPRO due to high mortality in the larval phase. The cultivars BRS 523 and BRS 543 RR “block technology” suggest displays antixenosis and or antibiosis to A. gemmatalis. This cultivars can be used by soybean producers in combination with other control tactics in soybean IPM.