斜纹夜蛾性诱剂不同悬挂高度及田间风向对诱集效果的影响

Effects of hanging height of sex-attractant and field wind direction on trapping Prodenia litura Fabricius

试验设置斜纹夜蛾性诱剂50、100 cm和150 cm悬挂高度,以及东、西、南、北、中等5个方位。通过大田逐日诱集数量分析,发现斜纹夜蛾性诱剂在十字花科蔬菜上的最佳悬挂高度为100 cm;和夜间最多风向平行直线排列的诱捕器诱集量明显高于垂直直线排列的诱捕器诱集量;诱集量最高的诱捕器为位于与夜间最多风向的平行方向诱捕器,其吻合率为61.11%,若将诱集量为次多值的诱捕器计算在内,则其吻合率高达94.44%。

A field experiment of trapping P. litura was carried out by hanging sex-attractant at heights of 10, 100 and 150 cm and locating it in the middle, east, west, north and south of the crucifer vegetable field. The statistical analysis of daily trapped insects showed that the optimal hanging height was 100 cm. The number of the insects trapped by the trappers parallel to the main wind direction at night was obviously greater than that trapped by the trappers perpendicular to the main wind direction. The coincidence degree between trappers with the greatest number of trapped insects and ones parallel to the main wind direction was 61.11%, and if trappers with the second greatest number of trapped insects were counted, the coincidence degree was 94.44%.