Effects of transgenic Bt rice on Scirpophaga incertulas (Walker) populations in paddy fields

In order to investigate the resisitence potentials of Scirpophaga incertulas(Walker)to transgenic Bt rice,the population parameters of the 3rd generation of S.incertulas on hybrid Bt rice and non-Bt hybrid rice were studied.The results showed that the survival rate of early instar larvae at the boring stage on Bt hybrid rice was 4.03%,significantly lower than that on non-Bt hybrid rice(55.76%).The infestation rate of larval on Bt hybrid rice was 1.75%,remarkably lower than that on non-Bt hybrid rice(5.98%).The larval developmental duration of S.incertulas on Bt hybrid rice was highly prolonged when compared with non-Bt rice.