共查询到18条相似文献,搜索用时 93 毫秒
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捕蝇笼、物理诱黏剂均能同时诱集到南瓜实蝇和桔小实蝇且效果良好,捕蝇笼对苍蝇类卫生害虫诱集效果也非常好.捕蝇笼间隔距离20m、30m、50m,诱集的桔小实蝇数量均值差异不显著,但诱集的南瓜实蝇数量均值差异显著,以间隔50m距离的诱虫量最大,达每笼48头,显著多于20m距离的诱虫量18.67头,极显著多于30m距离的诱虫量11.89头.物理诱黏瓶间隔距离20m、30m、50m,诱杀的桔小实蝇、南瓜实蝇数量均值差异不显著.捕蝇笼、物理诱黏剂和性诱剂诱杀桔小实蝇的数量均值差异不显著.捕蝇笼诱集南瓜实蝇和其它昆虫的数量及总诱虫量均值明显高于物理诱黏剂,差异达极显著水平.捕蝇笼和物理诱黏剂均可作为实蝇类害虫监测、调查与防治的一项技术措施. 相似文献
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性诱剂对小菜蛾种群控制的应用技术研究 总被引:20,自引:0,他引:20
应用扩展的均匀设计,探讨了不同蔬菜种类、不同小菜蛾卵量基数和不同性诱剂诱盆数量等条件下小菜蛾性诱剂的控制效果。结果表明,小菜蛾卵量基数和诱盆数量的变化是影响控制效果的主要因素,而蔬菜种类的作用较小;同时建立了控制效果与这些因素之间变化的动态模型。通过对该模型的分析和模拟,建立了田间不同条件下性诱剂的定量化应用技术。 相似文献
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采用诱捕率指标,评价了田间不同成虫密度下,性诱剂诱捕器不同放置密度对小菜蛾种群的诱捕效果.结果表明.在放置性诱剂后的前6 d内诱捕作用较小,其后诱蛾效果不断增强,第10-15 d出现诱蛾高峰,20 d后显著下降.在田间小菜蛾成虫不同密度下,诱蛾效果随诱捕器数量的增加而加强.当诱捕器放置密度相同时,诱蛾量随菜蛾密度的升高而增加,诱蛾率在高密度下反而下降.同时,性诱剂可有效地减少小菜蛾的田间落卵量,第6-12 d开始卵量下降.15~21 d后落卵量降至最低.与对照菜田相比,其落卵量可减少17.85%~72.19%. 相似文献
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试验表明,以每667m2设置4个诱捕器,并沿蔬菜种植行呈直线排列诱蛾量最多,22d内共诱得雄蛾453头,诱捕器数量每667m2设置5、6个的效果与4个的诱蛾量差别不大,但都高于设置3个诱捕器.通过性诱成虫,田间落卵量明显少于常规化防区50%以上.并讨论了小菜蛾性诱捕器在田间的设置与诱蛾效果的关系. 相似文献
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侵染小菜蛾的布伦克虫疠霉Pandora blunckii在广东省首次发现,该菌可引起西洋菜田中小菜蛾Plutella xylostella种群的流行病,侵染率为20.7%,主要侵染小菜蛾三、四龄幼虫;该菌不能侵染四龄菜青虫。本文还对该菌侵染小菜蛾引起的症状及其形态特征进行了描述。 相似文献
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Field trials were conducted in cabbage (Brassica oleracea var capitata), cauliflower (B oleracea var botrytis) and knol khol (B oleracea gongylodes) crops at two different locations in Karnataka State (India) to optimize the timing of insecticide applications to control the diamondback moth, Plutella xylostella, using sex pheromone traps. Our results indicate that applications of cartap hydrochloride as insecticide during a 12–24 h period after the pheromone traps had caught on average 8, 12 and 16 males per trap per night in cabbage, cauliflower and knol khol, respectively, were significantly more effective than regular insecticide sprays at 7, 9, 12 or 15 days after transplantation. This was demonstrated by estimation of the mean number of eggs and larvae per plant, the percentage of holes produced, as well as the marketable yield of the three crops at each location. A good correlation between the immature stages, infestation level, the estimated crop yield and the number of moths caught in pheromone traps was also found, indicating the usefulness of pheromone‐based monitoring traps to predict population densities of the pest. © 2001 Society of Chemical Industry 相似文献