不同密度化学信息素控制烟草斜纹夜蛾的效果

目的]研究化学信息素控制烟草斜纹夜蛾的田间最适放置密度。方法]分别按25.8 m×25.8 m(15.0个/hm2)、31.6 m×31.6m(22.5个/hm2)和36.5 m×36.5 m(30.0个/hm2)各放置16个诱捕器(4行×4排),同时设不低于2 hm2的空白对照,3次重复。结果]在忽略风向的影响下,随单个诱捕器控制面积的增加,诱蛾量有所增加,但3种不同密度处理间诱蛾量差异不显著;3种放置密度均可有效控制烟田斜纹夜蛾的发生,减少农药使用,保护田间自然天敌,降低防治成本。结论]化学信息素控制烟草斜纹夜蛾的诱捕器放置密度以31.6 m×31.6 m(22.5个/hm2)为宜。

Effects of Different Density of Chemical Pheromones to Control Tobacco Cutworm Moth Spodoptera litura

Objective] To study the most suitable density of chemical pheromone to control Spodoptera litura in tobacco fields.Method] 16 traps(4 lines × 4 rows) were placed as 25.8 m × 25.8 m(15.0 trap/hm2),31.6 m × 31.6 m(22.5 trap/hm2) and 36.5 m × 36.5 m(30.0 trap/hm2),meanwhile a control area more than 2 hm2 was set up with three repetitions.Result] Without taking into account the impact of wind direction,the trap catches increased with the increase of the controlled area of a single trap,but trap catches were not significantly different under the three different density treatments.Under these three densities,the chemical pheromone had effective control to S.liture in tobacco fields,reduced the use of pesticides and protected the natural enemies and reduced the control cost.Conclusion] The suitable density of chemical pheromone traps to control tobacco cutworm moth S.litura was the specification of 31.6 m × 31.6 m(22.5 trap/hm2).