Four soybean genotypes, PI 227687, PI 229358, Davis and Hardee were tested for their antixenosis and antibiosis to the soybean hairy caterpillar, Spilarctia casignata Koll. PI 227687 and PI 229358 showed greater antixenosis and strong antibiosis (high larval and pupal mortalities, reduced pupal weight, and a low growth index). Davis and Hardee were the favoured hosts as indicated by high larval preference based on increased feeding and low larval and pupal mortalities, increased pupal weight and a high growth index.
