不同性诱剂对鲜食玉米田草地贪夜蛾的诱捕效果及影响因子研究

Trapping efficacy and influencing factors of sex attractants on thetrapping of Spodoptera frugiperda in fresh corn field

通过研究诱捕器-性诱芯组合的诱集效果,及诱捕器悬挂高度、排列间距等空间分布因素对鲜食玉米田草地贪夜蛾诱捕效果的影响,明确草地贪夜蛾性诱装置最佳使用方案,为使用性信息素进行草地贪夜蛾的种群监测和防控提供技术支持。选用3种性诱芯和3种诱捕器进行配对组合,进行田间诱捕效果比较试验;使用BLB性诱芯和专用诱捕器组合进行4个诱捕器悬挂高度和3个排列间距诱捕试验,并进行草地贪夜蛾成虫种群本地周年发生动态监测。结果表明:9个组合中BLB性诱芯和专用诱捕器组合诱捕效果最好;3种诱芯平均诱蛾量无显著差异;3种诱捕器中专用诱捕器诱捕效果最佳,飞蛾通用诱捕器诱捕效果最差。4个诱捕器悬挂高度在玉米拔节期时诱蛾量无显著差异,抽雄后2.2 m处理诱蛾量显著高于其他处理。诱捕器排列间距30 m处理的诱蛾量显著高于20 m和25 m的,但3个间距处理间田间草地贪夜蛾幼虫为害株率无显著差异。性诱监测发现,2020年5月中旬、6月下旬、7月下旬、9月上旬和10月中旬为成虫高峰期。草地贪夜蛾专用诱捕器搭配BLB性诱芯具有最佳诱捕效果,田间最优悬挂高度应高于玉米植株,诱捕器田间设置间距以30 m为宜。性诱适用于草地贪夜蛾的种群监测,并可作为害虫防治时的辅助手段。

To optimize the sex pheromone trap technology for Spodoptera frugiperda,the trapping efficacy of different lures and trap types,hanging height and distance were studied.The results would provide technical support to the population monitoring and control of S.frugiperda.Nine different combinations of 3 lures and 3 traps were used to compare the trapping efficacy in the field.The combination of lures from Bioglobal and special trap were used to compare the trapping efficacy of different hanging height and interval.In addition,this combination was used to monitor the local annual occurrence of S.frugiperda adult population.The results showed that the trapping efficacy using combination of lures from Bioglobal and special trap was the best.However,there were no significant difference among the 3 different lures.The trapping efficacy of the special trap was the best,while the universal moth trap was worse.At the jointing stage of corn,there was no significant difference in the attracted moth number among the four hanging heights,and the attracted moth number at the height of 2.2 m was significantly higher than that of other treatments after tasseling stage.The number of moths attracted by the traps at 30 m interval was significantly higher than that at 20 m and 25 m interval.There was no significant difference in the plant damage rate among three treatments.In 2020,five adult peaks were observed in mid-May,late June,late July,early September and mid-October.The special trap combined with the lures from Bioglobal had the best trap effect.And the optimal hanging height in the field should be higher than that of the corn plant.The distance between the trap in the field should be 30 m.Sex pheromone trap technology can be used in the population monitoring of S.frugiperda and as an auxiliary means of pest control.