【摘要】 二点委夜蛾[Athetis lepigone(Mschler)]是2005年河北省首次发现报道的夏玉米苗期的新害虫,危害日趋严重。本文通过分析近年来对二点委夜蛾成虫的监测数据,研究其发生世代。结果表明:二点委夜蛾在河北省每年发生4代。4-5月为越冬代成虫期,6-7月上旬为1代成虫期,7月中旬-8月上旬为2代成虫期,8月中旬-9月下旬为3代成虫期。其中1～2代成虫蛾量大,蛾峰明显,以第2代幼虫为害玉米苗最为严重,越冬代成虫和第3代成虫蛾量较少,蛾峰不太明显。更多还原

【Abstract】 Athetis lepigone(Mschler) is a new insect pest of corn at seedling stage and reported first in Hebei Province in 2005.It becomes more serious in recent years.In order to study how many generations occur annually in Hebei Province,the adult monitoring data of A.lepigone in recent years were analyzed.Results showed that there are 4 generations of A.lepigone per year in Hebei Province.The durations for adults of overwintering genenation,1st-generation,2nd-generation and 3rd-generations is from April to May,June to the beginning of July,mid July to early of August,and mid August to the end of September,respectively.Among different generation of adult occurrence,the amount of the 1st-and 2nd-generation adults are higher with obvious peak,but not the overwintering and 3rd generations.The damage made by the larvae of the second generation of A.lepigone at the summer corn seedling is the most serious.更多还原