| 王伟兰1,2，陈红松2，黄立飞2，姜建军2，杨朗2.4种杀虫剂对取食朱槿的扶桑绵粉蚧的毒杀作用[J].广东农业科学,2014,41(9):99- |
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4种杀虫剂对取食朱槿的扶桑绵粉蚧的毒杀作用 |
| Toxic effects of four insecticides on mealybug, Phenacoccussolenopsis Tinsley (Hemiptera: Pseudococcidae) fedon Hibiscus rosa-sinensis (Malvales: Malvaceae) |
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| DOI： |
| 中文关键词: 扶桑绵粉蚧 朱槿 杀虫剂 毒杀效果 敏感性 |
| 英文关键词: Phenacoccus solenopsis Hibiscus rosasinensis insecticide toxic effect susceptibility |
| 基金项目:国家科技部国际合作项目（2011DFB30040）；广
西农业科学院科技发展基金（2009JM13，2012JZ08）；广西作物病
虫害生物学重点实验室开放基金（13-051-47-KF-5）；南宁市科
技局项目（20132308）；广西自然科学基金（桂科青0991059） |
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| 中文摘要: |
| 扶桑绵粉蚧已入侵广西，并在朱槿上成功定殖，且对朱槿造成一定的为害，研究杀虫剂对其毒杀作用，
可为其大暴发时的应急防治提供参考。采用浸叶法测定了丙溴磷、毒死蜱、吡虫啉、印楝油对取食朱槿的扶桑绵粉蚧
的毒杀效果，用Probit Analysis 建立毒力回归方程，比较了扶桑绵粉蚧对不同杀虫剂的敏感性。结果表明，印楝油对
扶桑绵粉蚧的直接毒杀作用较弱，药后3 d 最高浓度（10 mL/L）对一龄若虫的致死率仅为66.43%，对其他3 个虫龄
几乎无直接毒杀作用；另外3 种化学杀虫剂均具较强的毒杀作用，药后3 d，大多数试验浓度的校正死亡率在50.00%
以上，最高浓度的死亡率均超过90.00%；不同虫龄的敏感性顺序为一龄跃二龄跃三龄跃雌成虫，药剂的敏感性顺序为
丙溴磷跃吡虫啉跃毒死蜱。说明化学杀虫剂对扶桑绵粉蚧的直接毒杀效果显著，但不同虫龄对不同药剂的敏感性差异
较大，田间用药宜根据虫龄结构，选择合适的药剂、剂量和时机。 |
| 英文摘要: |
| Phenacoccus solenopsis has invaded Guangxi and successfully colonized on Hibiscus rosa-sinensis, and it
has caused some damage to H. rosa-sinensis. In order to provide references for emergency control of its outbreak, leaf
dipping method was used to test the toxic effects of profenofos, chlorpyrifos, imidacloprid and neem oil on mealybug fed
on H. rosa-sinensis, and toxicity regression equations were established by Probit Analysis to compare the susceptibility of
different instars to different insecticides in this paper. The results showed that the direct toxic effect of neem oil against
this pest was weak, after 3 days treatment, the corrected mortality rate of 1st instar nymphs for the highest concentration
(10 mL/L) was only 66.43%, and the highest concentration almost had no direct toxic effect on the other three instars.
The toxic effects of the other three chemical insecticides against this pest were powerful, after 3 days treatment, the
fatality rates of most doses were over 50.00%, and fatality rates of the highest concentrations were all over 90.00%. The
susceptibility order of different instars was 1st instar nymphs>2nd instar larvae>3rd instar larvae>female adult, and the
susceptibility order to insecticides was profenofos >
imidacloprid > chl orpyrifos. It suggests that the direct
toxic effects of chemical insecticides on mealybug are
significant, but the differences in the sensitivity of
different instars to different pesticides are obvious, so the
field application should select appropriate insecticide,
dose and right time based on the age structure of this
pest. |
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