四种诱集源对棉铃虫成虫的诱杀效果及有效半径比较

ASSESSMENT OF THE CONTROL EFFECTS AND EFFECTIVE RADn OF FOUR KINDS OF TRAPS FOR COTTON BOLLWORM IN COTTON FIELDS

研究了高压汞灯、双波灯、性诱剂和杨树枝把四种诱集源对棉铃虫(Helicoverpa armigera)的诱杀效果及有效半径。结果表明:四者均具有较明显的诱杀作用,其各自的诱杀效果有差异,并与棉铃虫种群数量有关,发生量大的世代或年份,效果较好,反之不明显或较差。综合比较各处理的诱蛾量、百株卵量、幼虫量及其活动态天敌量,发现其诱杀效果的优劣次序为高压汞灯、双波灯、性诱剂、杨树枝把;2种灯的有效诱杀半径约为80～160m,性诱剂约30m,杨树枝把约在10m内,该范围内高压汞灯、双波灯区内的百株卵量比对照分别降低31.7％～33.8％、40.1％～41.5％,性诱剂降低10.7％～21.5％,杨树枝把降低4.8％～14.6％。

The control effects and effective radii of four kinds of traps, namely, the high pressure mercury vapor lamp (HPML) , double wave lamp (DWL), sex pheromone carrier (SPG) and poplar twig bundle (PTB) for cotton bollworm Helicoverpa armigera (Hubner) were evaluated in cotton fields in linqing City, Shandong Province during 1994 - 1995. The results showed that all the traps mentioned above possessed strong attraction for H. armigera in its rampant year, while the attraction decreased with reduction of its population density. The order of comprehensive effects of these traps combined with the number of eggs, larvae of H. armigera and functional natural enemies per 100 plants was HPML> DWL > SPG > PTB. The effective radii of the two light traps, SPC and PTB were 80-160, 30 and 10 meters, respectively. In comparison with the check field without any trapping treatment, the egg number per 100 plants in plots treated with HPML, DWL, SPC, PTB reduced by 31.7%-33.8%, 40.1%-41.5%, 10.7%-21.5%, and 4.8% - 14.6% , respectively .