光源数量和熏蒸处理对高空灯诱捕效果的影响

Effect of the number of light sources and fumigation on the effectiveness of searchlight traps

【目的】为研究提升高空灯对迁飞性害虫的诱捕效率。【方法】比较研究了不同光源数量的4种高空灯诱捕昆虫的数量、种类及群落结构,测定了熏蒸处理对防止诱集昆虫逃逸作用的影响。【结果】4种高空灯诱集的昆虫234650头,发现光源数量X与诱捕虫量Y符合线性方程Y=13398.91+16459.49X,5种光源高空灯诱捕量是单光源的3.44倍,在4个发生高峰期,高空灯诱集数量也呈现出随光源数量增加的趋势;4种高空灯诱集昆虫种类为71-95种,鳞翅目和夜蛾科种类为优势类群,4种高空灯诱捕的昆虫的群落相似性处于中等不相似和中等相似之间,在4个高峰期4种高空灯诱捕的昆虫的群落相似性为中等不相似和极不相似;对诱集的昆虫进行熏蒸处理,诱捕数量比对照增加了22.94%,高峰期诱捕数量比对照增加了89.17%。【结论】增加光源数量可显著增加高空灯诱捕迁飞性害虫的数量,对诱集的昆虫群落结构也会产生影响;在高空灯增加药剂熏蒸措施可有效减少害虫逃逸,提高诱捕效果。

[Objectives]To improve the efficiency of searchlight trapping for migratory pests.[Methods]The number,species and community structure of insects trapped using four kinds of searchlight were compared,and the effect of fumigation on preventing the escape of trapped insects was determined.[Results]A total of 234650 insects were trapped using the four kinds of searchlight.The relationship between the number of insects trapped(Y)and the number of light sources(X)conformed to the linear equation Y=13398.91+16459.49 X.The number of insects trapped using all 5 light sources was 3.44 times that of a single light source.During the four peak trapping periods,the number of insects trapped also increased with the number of light sources.71 to 95 species of insect were trapped by the four kinds of searchlight.The Lepidoptera and Noctuidae were the dominant taxa.The community similarity of the insects trapped by each of the four searchlights was between medium dissimilarity and medium similarity.The community similarity of the insects trapped by each kind of searchlight during the four peak periods was medium dissimilarity and extreme dissimilarity.The number of trapped insects was 22.94%higher than the control,and increased by 89.17%during the peak period.[Conclusion]Increasing the number of light sources can both significantly increase the number of migratory pests trapped using searchlights and affect the community structure of trapped insects.Adding fumigation to searchlight traps can effectively reduce the escape of trapped insects.