昆虫性信息素在信阳茶园中的应用效果初报

Application Effect of Insect Sex Pheromone in Xinyang Tea Garden

为了探索昆虫性信息素在茶园中的应用效果,利用茶毛虫和茶尺蠖性信息素在信阳震雷山茶园进行了引诱试验。结果发现,当虫口密度较低时,性诱剂诱虫量与害虫的种群数量呈正相关,能准确反映害虫种群数量的变化动态。如茶尺蠖第1代成虫,性诱剂每日诱虫量高于黑光灯诱虫量,其中性诱剂日诱虫量最多为35头,而同日黑光灯的诱虫量仅为3头;茶毛虫越冬代、第2代虫口密度较低时,性诱剂诱虫量也能准确反映其种群数量的变化动态。而当虫口密度过高时,性诱剂预测数较黑光灯预测偏低,如茶毛虫第1代蛾量大增,性诱剂最高诱虫量为155头,而黑光灯最高诱虫量达298头,后者则能反映种群数量的增加。当田间害虫密度较低时,性信息素作为测报工具和防治手段,效果比黑光灯好,对茶尺蠖和茶毛虫的防效分别达到73.36%、90.28%;当害虫大发生时,性信息素对茶毛虫的防效不太理想,还需结合其他无公害防治手段进行防治。

In order to study the effect of insect sex pheromone in tea gardens,an experiment was carried out in Zhenleishan tea garden using tussock moth and geometrid sex pheromone.The results showed that,when population density of tussock moth and geometrid at a low level,there was a positive correlation between trap catches and population.The trap catches could accurately reflect dynamic changes of insect population.The first generation adults of geometrid were used as an example.The trap catches of geometrid sex pheromone was more than that of black lamp.The daily maximum trap catches of the former was 35,but that of the latter was only 3 in the same day.When the population density of the overwintering and second generation of tussock moth was low,the trap catches could also accurately reflect dynamic changes of insect population.But if the population density was at a high level,the predictive index of sex pheromone was lower than that of black lamp.For example,when the first generation adults of tussock moth seriously increased,the highest trap catches of sex pheromone was 155,but that of the black lamp was 298,so trap catches of black lamp could accurately reflect the increasing trend of insect population.As the forecast and prevention tool,the sex pheromone had better effect than black light lamp when population density of tea tussock moth and geometrid was at a low level,and the control effects of sex pheromone on geometrid and tussock moth were 73.36% and 90.28%,respectively.When tea tussock moth broke out,the control effect of sex pheromone was not obvious.The combination with other non-pollution prevention means was needed.