不同药物对祁连山北麓草原蝗虫混合种群的防效评价

Evaluation of The Control Effect of Different Drugs on The Mixed Population of Grassland Grasshopper in The Northern Foot of Qilian Mountains

中文关键词: 温性草原  蝗虫  防治效果

英文关键词: warm grassland  grassland grasshopper  control effect

中文摘要:

      为科学筛选适宜的草原蝗虫防治药物和施药浓度，本试验比较了3种不同药剂、不同施药浓度对草原蝗虫的防治效果。结果表明：试验区蝗虫混合虫口密度约为15头/m2，3种药剂对草原蝗虫均有较好的防治效果，其中，4.5%高效氯氰菊酯起效最快，施药3d后其防治效果就达到90%以上，但是7d后，300ml/hm2的1.8%阿维菌素和750ml/hm2的1.3％苦参碱两个剂量的防治效果与600ml/hm2的4.5％高效氯氰菊酯的防治效果差异不显著（P＞0.05）。为保证防治效果和生态安全性，建议在一般防治中使用苦参碱和阿维菌素，推荐使用剂量为750ml/hm2和300ml/hm2，在危害严重时使用高效氯氰菊酯，推荐使用剂量为600ml/hm2。

英文摘要:

      In order to screen the suitable control drugs and spraying concentration of grassland grasshopper, the control effect of 3 different agents with different spraying concentration on grassland grasshopper was compared in this experiment. The results showed that: The mixed population density of grassland grasshopper in the test area was about 15 heads /m2, and the three agents had good control effect on grassland grasshopper. Among them, 4.5% cypermethrin had the fastest effect, and the control effect reached more than 90% after 3d application. The control effect of 1.8% abamectin at 300ml/hm2 and 1.3% matrine at 750ml/hm2 was not significantly different from that of 4.5% cypermethrin at 600ml/hm2 (P＞0.05). In order to ensure the control effect and ecological safety, it is recommended to use matrine and avermectin in general control, the recommended dosage is 750ml/hm2 and 300ml/hm2, and the recommended dosage is 600ml/hm2 when the harm is serious.