【作者】 徐金汉； 关瑞峰； 姚文辉； 连占烽； 李世铭；

【Author】 XU Jin-han~1 GUAN Rui-feng~2 LIAN Zhan-feng~1 LI Shi-ming~1 1 College of Plant Protection,Fujian Agriculture and Forestry University,Fuzhou 350002,China; 2 plant Protection & Quarantine Station of Fujian Province,Fuzhou 350003,China

【机构】 福建农林大学植物保护学院； 福建省植保植检站；

【摘要】 根据福建不同地区水稻生产及稻螟发生情况,于2006～2008年对水稻螟虫越冬特点进行了调查。结果表明:福建主要稻区越冬期水稻螟虫主要以二化螟为主,占越冬螟虫总量的77.25%;二化螟主要以5～6龄幼虫在稻桩、稻草及冬种作物等处越冬;越冬虫量主要分布在10～20cm的稻桩中;越冬代成虫羽化从3月下旬持续至5月初:机割稻田二化螟的越冬虫口密度明显高于人工收割稻田,而幼虫死亡率明显低于人工收割稻田。更多还原

【Abstract】 Based on the growth office and the occurrence office stem borers in different regions in Fujian,the overwintering office stem borers was investigated from 2006 to 2008.The result showed that the proportion of Chilo supperssalis was 77.25 % of total overwintering rice stem borers,larval instars overwintering was mostly 5^th-6^thinstar in rice piles,straw and winter crops,etc..The larvae overwinter usually in the rice piles which are 10-20cm long;The eclosion-staring of overwintering generation lasts from late-March to early-May.The population densities of overwintering larvae in rice fields which are harvested with machine are obviously higher than the ones harvested by hand,but the death rates are obviously lower.更多还原