一种新型的昆虫诱捕器及其对长足大竹象的诱捕作用

A new type of insect trap and its trapping effect on Cyrtotrachelus buqueti

生态诱捕竹林主要害虫是当前研究的难点。用长形竹条和可降解的聚乙烯光滑细线编织成圆柱体虫网诱捕器,以竹笋为引诱剂,研究了不同孔径的虫网对不同大小的长足大竹象成虫的捕获效果,分析了虫网诱捕器捕获成虫的主要部位及该部位的的超微结构,在此基础上,探索了成虫足的作用力特点及其与虫网的互作机制。研究表明(1)在一定范围内,诱捕率Y与虫网边长X1极显著相关,并受中足长度X2的影响,三者间的回归方程为Y=-30.551+13.945X1+7.825X2(X1∈[2,4.5]、X2∈[2.5,2.9])。(2)虫网诱捕器主要捕捉成虫的主要部位是前、中、后足的转节和腿节。(3)足与虫网的互作主要是机械作用,诱捕器对长足大竹象的捕获主要是虫网与足间的机械作用的结果。虫网诱捕器制作简便,成本低,无毒无污染,是捕获长足大竹象的有效工具。其研究结果为竹林害虫生态防治提供了重要理论依据。

The ecological trap of bamboo pests was the difficulty of current study.In the study,a new type of cylindrical insect traps was produced with long-shaped bamboo and smooth and thin polyethylene,and its trapping effect on different size C.buqueti was carried out with bamboo shoot taken as attractant.On the basic of analyzing trapped parts on imago and its ultrastructure,the force characteristics of imago foots and the force mechanisms between the imago foots and insect net were analyzed.The results suggested that：（1） to some extent,trapping rate（Y） on C.buqueti was significantly related to mesh side length（X1）,and impacted by midleg length（X2）,and followed the equation of Y=-30.551＋13.945X1＋7.825X2（X1∈,X2∈[2.5,2.9]）.（2） The trapped main parts of imago by insect traps were tro-chanter and femur of foreleg and midleg and hindleg.（3） The interaction between imago foots and insect net was mainly mechanical force,and the capture of insect trap on C.buqueti resulted from the mechanical force.The insect net trap with the traits of easy production and low cost and harmless was an effective capture tool to C.buqueti.As a result,this result provided an important theory basis for ecological control of bamboo pest.