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 generation is that most of the adults of first generation emigrated from early rice fields for summer and winter hibernation
文摘:研究表明，浙江省雙季稻區稻水象甲二代蟲量低的首要原因是絕大部分一代成蟲遷出早稻田
夏蟄並越冬，構成二代蟲源的比例極微。
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 generation is that most of the adults of first generation emigrated from early rice fields for summer and winter hibernation
研究表明，浙江省雙季稻區稻水象甲二代蟲量低的首要原因是絕大部分一代成蟲遷出早稻田夏蟄並越冬，構成二代蟲源的比例極微。
