藜麦害虫横纹菜蝽的药剂防治

Field Control of Eurydema Gebleri Kolenati on Chenopodium Quinoa Willd by Pesticides

通过喷雾法,在藜麦田分别使用1种微生物农药和4种化学农药实施了防治横纹菜蝽的试验,为生产中选择有效的横纹菜蝽防治药剂提供参考。结果显示,微生物农药球孢白僵菌的中、高剂量防效分别为74.51%、77.24%,化学农药溴氰菊酯用药量0.15 L/hm2防效最好,为93.08%,该药剂0.11 L/hm2与顺式氯氰菊酯0.25 L/hm2两个处理的防效次之,高效氯氟氰菊酯3个剂量及噻虫嗪的中、高剂量防效也均高于80%。建议在害虫发生初期使用球孢白僵菌,如遇害虫大量发生,则轮换使用菊酯类与新烟碱类农药。

One microbial pesticide and four chemical pesticides are used to controlEurydema gebleri onChenopodium quinoa by method of spray in this experiment.It provides reference for selecting effective control pesticides in production.The results show that the control effects of medium and high dose of Beauveria bassiana which belong to microbial pesticides are 74.51%and 77.24%respectively.The chemical pesticide deltamethrin whose dosage is 0.15 L/hm2 has the best control effect 93.08%,the control effects of 0.11 L/hm2 deltamethrin and 0.25 L/hm2 CIS cypermethrin take second place,and the control effects of three doses of cypermethrin and the middle and high doses of thiamethoxam are also higher than 80%.It is suggested that Beauveria bassiana should be used in the early stage of pest occurrence.In case of a large number of insects,pyrethroids and neonicotinic pesticides should be used alternately.