性诱剂对主害代棉铃虫的诱杀效应研究

利用性诱剂诱杀江苏沿海地区三、四代棉铃虫的试验、示范结果表明 ,每 0 .1 3 4公顷棉田放置 1个诱芯盆的诱蛾效果较好且经济 ,与相同面积棉田内插放 40个树枝把的诱蛾效应比较 ,前者所诱雄蛾量增加 3 6.3 1 %～ 45 .5 9% ,雌蛾交配率下降 3 5 .64 %～ 44 .75 % ,田间落卵量降低 9.90 %～ 1 5 .0 5 % ,幼虫量减少 7.69%～ 1 2 .3 6% ,蕾铃被害量下降 4.49%。室内的性比试验证实 ,棉铃虫雌蛾的产卵量与群体中雌蛾的性比比例呈负相关

Study on Trapping Effect of Sex Attractant on Helicoverpa armigera in Main Injurious Generations

The experiments and demonstrations of trapping H.armigera in three and four generations by sex attractant were conducted in coastal area of Jiangsu province,the results indicated that putting one sex attractant-basin per 0.134hm 2 had better and economical trapping effect,in comparison with the rrapping effect of putting forty bunched branches per 0.134hm 2,the former increased trapped male moths by 36.31%～45.59%,decreased the mating rate of female moths by 35.64%～44.75%,egg number in cotton field by 9.90%～15.05%,larval number by 7.69%～12.36% and injuried cotton buds and bolls by 4.49%.Laboratory sex ratio experiment showed that the oviposition number of female H.armigera was negative correlative with the ratio of female moths in the colony of this insect.