【摘要】 国内有关文献均记载直纹稻苞虫以幼虫或卵、蛹在当地越冬。本研究通过两年对南阳市直纹稻苞虫初见雌成虫卵巢发育情况解剖分析和对当地发生情况系统调查表明:本地每年始见雌成虫卵巢发育均在四级以上,且均已交配,末代幼虫在杂草上不能发育到蛹即死亡;越冬期多处调查未发现任何虫态;当地上、下两代幼虫发生数量悬殊;该虫成虫和稻纵卷时螟成虫有明显的同步发生现象。据此认为,河南南阳直纹稻苞虫每年初始虫源来自南方。更多还原

【Abstract】 Domestic relevant data showed that r ice skipper hibernated by larva,ovu m or nymph in local fields.Two years’ research were carried out on dissecting the initial female adults of rice skipper to analyze the growth of germanium and to investigate their o ccurrence systematically,the resu lts indicated that all the local init ial female adults had been mated and the growth o f their germanium were above 4 th degree.The last generation larva in weeds died before they changed into n ymph,Any states of rice skipper coul d not be found in hibernation stage in many places.The former and the later generation larva’s population are r emarkably different in Nanyang city.Rice skipper adults often occurred a t the same time as rice leaf roller.Ba sed on the reserach,it can be conclud ed that the initial rice skipper in Nanyang city of Henan Province migrated f rom South China.更多还原