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Effects of sublethal dose of chlorpyrifos on the virulence and productivity of the small brown planthopper,Laodelphax striatellus (Fallén) (Homoptera:Delphacidae)
Author(s): 
Pages: 680-686
Year: Issue:  6
Journal: Acta Entomologica Sinica

Keyword:  灰飞虱 毒死蜱 亚致死剂量 亚致死效应 致害性 繁殖力;
Abstract: 为科学用药防治灰飞虱Laodelphax striatellus(Fallén)提供理论依据,采用麦秆浸渍法测定毒死蜱对灰飞虱成虫的室内活性,并用Parafilm小袋法和滤纸漏斗法测定毒死蜱亚致死剂量对灰飞虱蜜露排泄量、虫体增重、产卵量等指标的影响。Parafilm小袋法的测定结果表明,经毒死蜱亚致死剂量(0.21mg/L有效成分)处理的灰飞虱单雌蜜露分泌量和虫体增重分别比对照增加10.99%和22.22%,但与对照相比无显著差异(P>0.05);单雌产卵量为79.6±26.4个,比对照增加12.27%,差异达到极显著水平(P<0.01)。滤纸漏斗法的测定结果表明,处理过的灰飞虱雌成虫蜜露分泌面积为119.74±5.90mm2,比对照增加13.06%,差异达到显著水平(P<0.05)。毒死蜱亚致死剂量处理后对灰飞虱蜜露分泌量、虫体增重和单雌产卵量均表现不同程度的促进作用,说明毒死蜱亚致死剂量可能会导致灰飞虱致害性加剧。本研究结果对深入研究杀虫剂对灰飞虱种群的亚致死效应具有重要的参考价值。
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