Wild soybean consumption by four species of lepidopteran larvae was investigated to get basic data for an environmental assessment of Bt soybean. Fourteen species were preliminarily tested. The leaf area eaten by the last instar larvae were 295, 33.2, 17.3 and 16.3 cm2 for Cifuna locuples confuse, Pleuroptya ruralis, Paragabara ochreipennis and Archips semistructa, respectively.
