2种树枝把在田间对棉铃虫的引诱作用

Attraction of Two Poplar Bundles for Cotton Bolloworm, Helicoverpa armigera (Hübner) in Fields

比较了枫杨Pterocaryastenoptera枝把与加拿大杨Populuscanadensis枝把在田间对棉铃虫Helicover paarmigera (H櫣ｂｎｅｒ)的引诱作用。结果表明 ,2种树枝把在田间均能有效地诱集棉铃虫 ;加拿大杨枝把的诱蛾效果要强于枫杨枝把 ;枫杨枝把与加拿大杨枝把诱集的雄蛾量与上把的雌蛾量呈显著的正相关 ,与田间雄蛾量相关性不显著 ;将枫杨与加拿大杨制成混合枝把后与加拿大杨枝把相比诱蛾量没有变化 ,但与枫杨枝把相比则诱蛾量显著增加 ,把上的雄蛾量与上把的雌蛾量呈显著的正相关 ,而与田间雄蛾量无显著相关 ;各种树枝把上的棉铃虫雌雄比均大于 1。在预测田间棉铃虫的发生时 ,用加拿大杨枝把诱蛾优于枫杨枝把和混合枝把。

The attraction of two poplar bundles for cotton bollworm (CB), Helicoverpa armigera (Hübner) was evaluated in fields. The two bundles were made of Chinese wing-nut tree, Pterocarya stenoptera and Canadian poplar, Populus canadensis, respectively. They were both attractive to CB adults. P. canadensis bundle (POCAB) demonstrated more powerful attraction to CB than P. stenoptera bundle (PTSTB) did. The number of the males captured was correlated significantly with that of the female captured in PTSTB and POCAB, but not with that of the males captured with sex pheromone attractant and that with high-pressure mercury light in fields each day. A combination of PTSTB and POCAB in 1∶1 (CPP) was the same attractive to CB as POCAB but was more attractive to CB than PTSTB. The female to male sex ratios of the moth were all over 1 on the three bundles. It was better to monitor the occurrence of CB in field by using POCAB than by using PTSTB and CPP. Besides,tha attraction of PTSTB and POCAB for CB was discussed in this paper.