Abstract: The investigation of summer migration of rice water weevil Lissorhoptrus oryzophilus Kuschel in double cropping rice area of Zhejiang Province in 1994 and 1995 indicated that the main cause of its always low population density in second generati
Abstract: The investigation of summer migration of rice water weevil Lissorhoptrus oryzophilus Kuschel in double cropping rice area of Zhejiang Province in 1994 and 1995 indicated that the main cause of its always low population density in second generati
文摘:研究表明，浙江省双季稻区稻水象甲二代虫量低的首要原因是绝大部分一代成虫迁出早稻田夏蛰并越冬，构成二代虫源的比例极微。