Reproductive isolation experiments on moths collected from different zones or hosts, morpholgical identfication, male response to pheromones and feeding habits in Ostrinia spp. were studied. The results indicate that corn borers feeding on sibling cocklebur (Xanthium sibiricum) in Zhangjiakou were European corn borers (ECB), Ostrinia nubilalis, the same species collected from the Yining area of Xinjiang Autonomous Region. The predominant corn borer species feeding on corn was, however, identical to the Asia...