重点单项诱杀措施复合配置对棉铃虫的诱杀效果及规格比较

ASSESSMENT ON THE CONTROL EFFECT OF COMPOUND TRAP MEASURES ON HELICOVERPA ARMIGERA (HBNER)

不同灯光与性诱剂或杨树枝把的复合配置处理对棉铃虫Ｈｅｌｉｃｏｖｅｒｐａａｒｍｉｇｅｒａ成虫均具有较明显的诱杀作用，其各自的田间控制效果各不相同，且明显与棉铃虫田间实际发生的相对程度有关。在一定范围内，棉铃虫发生量大的世代或年份，控制效果较好，发生量超常大时控制效果有所降低。综合分析比较该几种复合配置诱集源处理的诱蛾量、田间百株卵量、幼虫量及其对棉铃虫有效态天敌量的影响等因素，结果显示：在不同灯光与性诱剂或杨树枝把的复合配置处理中，以高压汞灯和性诱剂复配效果最好，双波灯与性诱剂的复配效果稍差。高压汞灯与性诱剂、双波灯与性诱剂复配处理区的百株卵量在１６０ｍ内分别比对照降低３４５％、２８６％。性诱剂宜设置于高压汞灯区外围８０～１６０ｍ外，以形成两者空间和时间上的互补。

The control effects of several compound trap measures on cotton bollworm (CBW), Helicoverpa armigera (Hübner),including double wave lamp,high pressure mercury vapour lamp with sex pheromone or poplar branches bundle trap respctively,were evaluated in cotton field in Linqing,Shandong Province,China in 1995.The main results were as follows: The compound traps combining two different lamps with sex pheromone or poplar branches bundle show obvious control effect on CBW moths.The control effect is affected by the quantity of the CBW population in the field,i.e.when a relative large quantity of CBW population occurs in a generation,their control effect could have some good result,but when the quantity of the CBW population in the field is far beyond the ordinary level it gets smaller than it should.After analyzing the CBW moth catches,the numbers of eggs,larvae and natural enemies in 100 individual cotton plant for each compound treatment in field comprehensively,the results indicate that the compound trap combining high pressure mercury vapour lamp with sex pheromone has the best control effect,double wave lamp with sex pheromone comes second.Comparing with control,the number of eggs in 100 individual cotton plants in the treatment region of compound trap combining high pressure mercury vapour lamp with sex pheromone and compound trap combining double wave lamp with sex pheromone can be reduced to 34 5%and 28 6%within 160m respectively.