四种杀虫剂亚致死剂量对中黑盲蝽发育和繁殖的影响

Sublethal effects of four insecticides on the development and reproduction of Adelphocoris suturalis Jakovlev(Hemiptera:Miridae)

使用瓶膜法确定4种常用杀虫剂(毒死蜱、硫丹、氯氟氰菊酯和吡虫啉)对中黑盲蝽Adelphocoris suturalis Jakovlev 1日龄成虫的亚致死剂量(LC10,LC20和LC30),并研究了其对中黑盲蝽的亚致死效应。结果表明:4种杀虫剂LC20剂量处理成虫均能降低雌雄虫的寿命,延长下一代卵的发育历期,但对卵的孵化率没有显著的影响;毒死蜱和硫丹能缩短产卵前期,氯氟氰菊酯和吡虫啉能降低产卵量。毒死蜱亚致死剂量LC10和LC30处理过的成虫与未处理过的成虫交叉配对后雌雄虫寿命均显著缩短;LC10各交叉处理能够缩短产卵历期,降低单雌产卵量和卵的孵化率,延长卵的发育历期;LC30♀×CK♂和LC30♀×LC30♂的下代若虫存活率为28.00%和36.36%,显著低于对照71.88%。结果说明这4种杀虫剂的亚致死剂量对中黑盲蝽生殖均有不利影响,接触杀虫剂与未接触杀虫剂的成虫交配对其后代也有不利影响。研究对于中黑盲蝽区域性综合防治具有一定的指导意义。

The sublethal doses （LC10, LC20, and LC30 ） of chlorpyrifos, endosulfan, cyhalothrin, and imidacloprid to the 1 day-old adults of Adelphocoris saturalis Jakovlev were determined in a glass-vial bioassay, and the sublethal effects of four insecticides at the LC20 dose on A. saturalis were studied. The results showed that the four insecticides significantly reduced the longevity of female and male adults and prolonged the hatching period, while not significantly affected the egg hatching rate. Chlorpyrifos and endosulfan significantly shortened the preovipositon period. Cyhalothrin and imidacloprid significantly decreased the eggs laid per female. After the survived individuals were treated with chlorpyrifos at the LC10 and LC30 doses cross-mated with the untreated adults, the longevity of female and male adults was also reduced. Different cross types at the LC10 dose all decreased the eggs laid per female and the hatching rates, and prolonged the hatching period. The survival rates of subsequent nymphs of LC30♀×CK♂ and LC30♀×LC30♂ were significantly lower than that of the control. These results showed that the sublethal doses of the four insecticides had adverse effects on fecundity of A. saturalis, and mating of treated adults with untreated ones also has an adverse effect on fecundity of their offsprings. This study provides certain guidance for designing the regional IPM program for A. saturalis.