杀虫灯诱杀昆虫的有效距离及生态学参数

采用人工标记释放回收技术,探讨了杀虫灯诱杀斜纹夜蛾Spodoptera litura Fabricius和甜菜夜蛾Spodoptera exigua Hübner的有效距离及不同安装高度的诱杀效果。诱杀结果表明,标记释放虫源离灯越远,其灯下回收率越低;灯高0.8m的灯下回收率显著高于灯高1.3m。提出了用"可控距离CID"、"诱杀中距离MTD50"、"诱杀黄金距离GTD61.8"3个生态学参数量化与规范杀虫灯对昆虫的诱杀距离。拟合结果表明,高0.8m杀虫灯诱杀斜纹夜蛾和甜菜夜蛾的可控距离分别为115.1m、110.9m,诱杀中距离分别为71.8m、67.4m,诱杀黄金距离分别为61.5m、57.1m,可控面积分别是4.2hm2、3.9hm2;高1.3m杀虫灯诱杀斜纹夜蛾和甜菜夜蛾的可控距离分别为108.1m、107.8m,诱杀中距离分别为66.6m、64.7m,诱杀黄金距离分别为56.7m、54.5m,可控面积分别是3.7hm2、3.6hm2。

Ecological parameters and effective distance of insecticidal lights

The effective distance for light-trapping Spodoptera litura Fabricius and Spodoptera exigua Hübner,and the relative trapping efficiency of light-traps at two different heights,were studied using mark-release-recapture methods.The results indicate a lower recovery rate of marked insects at longer distances from light traps and that the recovery rate for lights hung at 0.8 m was significantly greater than that of lights hung at 1.3 m.Lights hung at 0.8 m trapped significantly more S.litura and S.exigua than those at 1.3 m,but lights at both heights trapped both species equally effectively.Three ecological parameters,the Capable Insect-killing Distance （CID）,the Median Trapping Distance （MTD50） and the Golden Trapping Distance （GTD61.8）,are proposed to quantify and standardize the effective distance of light-traps.The fitted results show that the CID for S.litura Fabricius and S.exigua using 0.8m high light-traps was 115.1 and 110.9m respectively;the MTD50 was 71.8 m and 67.4 m respectively and the GTD61.8 was 61.5 m and 57.1 m respectively.The effective trapping area was 4.2 and 3.9 hm2 respectively.The CID for these species using 1.3 m high light-traps was 108.1m and 107.8m respectively,the MTD50 was 66.6m and 64.7 m respectively and the GTD61.8 was 56.7 m and 54.5 m respectively.The effective trapping area for each species was 3.7 hm2 and 3.6 hm2 respectively.