稻水蝇(Ephydra macellaria Egger)生活史研究

稻水蝇在内蒙古东部地区年发生 4代 ,世代重叠 ,发育历期世代间存有极显著的差异 ,虫态间发育历期除幼虫与蛹外亦呈极显著差异 .成虫越冬 .4月下旬越冬成虫大量出现 .4月下旬见一代卵 ,5月 10日为一代幼虫盛发期 ,化蛹在 5月 2 5日始盛 ,一代成虫于 5月下旬可见 .第二代 5月下旬见卵 ,6月上旬至 7月上旬幼虫发生 ,6月中旬至 7月上旬化蛹 ,6月下旬至 7月中旬为二代成虫可见期 .第三、四代幼虫分别发生于 7月上旬及下旬 ,第四代成虫于 8月中旬羽化 ,8月下旬达到羽化高峰并越冬 .第 2代危害严重 ,发生数量极显著多于其它各代

Study on Life Periods of Ephydra Macellaria Egger

The rice ephydrid( Ephydra macellaria Egger) has become one of the most injurious insects of rice in the eastern region of Inner Mongolia since late 1990's.This article was mainly concerned with life periods of the rice ephydrid.The results were as the following:There were four generations each year in eastern Inner Mongolia.Generations overlapped,overwinter with the fourth generation adults mainly.The adults of overwinter began to appear in late April.The oviposition peak to produce the first generation occurred in early May,that for the second generation in early June,the whole second generation standing from early June to early July.The larvae of third generation appeared in early July,that for the fourth generation in late July.that reach peak eclosion in late August.The second generation is the more injurious to rice than others