黑光灯诱集麦红吸浆虫成虫的数量及性比的变化

在河南省洛宁县小麦田夜间用黑光灯诱集麦红吸浆虫Sitodiplosis mosellana（Gehin）成虫,结果表明黑光灯对麦红吸浆虫成虫有极强的吸引作用,2010年4月30日至2010年5月19日之间日累计灯诱数量在9～5661头之间。5月7日是麦红吸浆虫发生的最高峰,当晚从20：00-23：30累计灯诱数量多达5661头;20：00以前天未完全黑,麦红吸浆虫成虫对黑光灯灯光不太敏感,灯诱数量较少;21：00-21：30时间段是麦红吸浆虫成虫夜间灯诱的高峰期,监测期间该时间段累计灯诱4134头;22：30以后吸浆虫活动显著减少。每晚灯诱数量与当日田间黄色粘板捕捉数量、网捕数量具有显著的相关关系,诱集到的红吸浆虫性比偏向雌性,表明黑光灯可以用作麦红吸浆虫成虫的监测工具。

The amount and sex-ratios of trapped wheat orange midge Sitodiplosis mosellana adults by black-light lamp

The attractiveness of black-light lamps to the wheat orange midge Sitodiplosis mosellana（Gehin） adults was investigated in Luoning county,Henan Province.Adult midges were strongly attracted by black-light lamps during the hours of darkness from April 30 to May 19.From 9 to 5 661 adults were attracted per night;the largest number,5 661 adults,was attracted between 21：00 and 23：30 on 7 May.Few adults were attracted before 20：00 because the midges were not sensitive to the lamp until it was totally dark.21：00—21：30 was the peak time for trapping,during which period 4 134 adults were attracted.Midge activity significantly declined after 22：30.The number of midges trapped using black-light lamps was significantly correlated with the number trapped by yellow sticky boards and sweep netting on the same day.Sex ratios of trapped adults were female biased.The results indicate that black-light lamps can be an effective monitoring tool for adult midges.