几种杀虫剂对扶桑绵粉蚧的药效测定
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几种杀虫剂对扶桑绵粉蚧的药效测定(毕业论文7150字)
摘 要: 为寻求防治扶桑绵粉蚧Phenacoccus solenopsis Tinsley有效化学药剂，在室内测定了9种化学农药对该虫的致死效果。结果表明，室内条件下三氯杀螨醇、阿维菌素、阿维-氯氰、联苯菊酯4种药剂对成虫的校正死亡率在23.7％～66.7％之间，明显低于对1龄若虫的作用效果；高效氯氟氰菊酯、吡虫啉、啶虫脒和毒死蜱4种化学药剂，在田间施药后第5天的防治效果可达到91％以上，其中啶虫脒和毒死蜱的防治效果分别达到95.6%和98.2%。证明5种化学药剂对扶桑绵粉蚧都有较好的防效，同时应注意针对不同的虫态有必要适当调整用药浓度(就除害处理而言)和施药次数，以达到理想的防治效果。
关键词：扶桑绵粉蚧;化学药剂;药效测定
The efficacy of several chemical insecticides to Phenacoccus solenopsis Tinsley．
Abstract: In order to seek effective control chemicals for Phenacoccus solenopsis Tinsley,the lethal effect of 9 chemical insecticides was assayed in laboratory. Four chemicals were chosen to test field control efficiency. The results showed that adult mortality made by dicofol,avermectin, avermectin-cypermethrin mixture and biphenthrin were 23.7%~66.7%,which was much lower than that to 1st instar nymph.In field spray after 5d, the control efficiency for 4 chemicals namely cyhalothrin, imidacloprid ,acetamiprid and chlorpyrifos were all over 91%,and for acetamiprid and chlorpyrifos acetamiprid and chlorpyrifos, the control efficiency was up to 95.6% and 98.2%,respectively. Practically, cyhalothrin, Imidacloprid, acetamiprid, malathion and chlopyrifos were recommended to be used as alternative chemicals for spray and treatment to P.solenopsis. In order to achieve the desired control effect, spray times and concentration of chemical (as it for treatment) should be adjusted according to development stage of this insect pest when chemical is applied.
Key words: Phenacoccus solenopsis; chemical insecticide; control efficiency
目 录
摘 要 4
关键词 4
1 前言 4
1.1 扶桑绵粉蚧特征 5
1.1.1 扶桑绵粉蚧的形态特征 5
1.1.2 扶桑绵粉蚧生物学特征 6
1.2 扶桑绵粉蚧寄主种类 6
1.3 扶桑绵粉蚧潜在分布 6
1.3.1 扶桑绵粉蚧在世界的潜在分布 6
1.3.2 扶桑绵粉蚧在中国的潜在分布 7
1.4 扶桑绵粉蚧传播 7
2 材料与方法 7
2.1 供试药剂 7
2.2 供试虫源 7
2.2.1 养殖虫源 7
2.2.2 实验条件 8
2.3 试验方法 8
2.3.1 9种化学农药的室内筛选试验 8
2.3.2 田间试验 8
2.3.3 效果调查 8
2.4 防治效果计算 8
3 结果与分析 9
4 结论与讨论 9
参考文献 9
致 谢 11 |
