摘要
为了筛选防治西瓜瓜蚜的有效药剂,用6种药剂进行了室内毒力测定和田间药效试验。结果表明,1.8%阿维菌素EC对瓜蚜的毒力最高,60g/L乙基多杀菌素SC毒力最低,48hLC50分别为0.38mg/L和2 225.63mg/L。6种药剂毒力大小依次为阿维菌素〉溴氰虫酰胺〉氟啶虫胺腈〉啶虫脒〉吡虫啉〉乙基多杀菌素。田间试验结果表明,1.8%阿维菌素EC 3 000倍、10%溴氰虫酰胺OD 2 000倍、22%氟啶虫胺腈SC 4 000倍对瓜蚜速效性及持效性均较好,3～14d防效均达到90%以上,防效差异不显著;20%啶虫脒WP 3 000倍和10%吡虫啉WP 3 000倍速效性及持效性均较差,1d防效分别为31.31%和6.66%,14d防效分别为57.39%和47.80%;60g/L乙基多杀菌素SC 1 000倍防效最差,药后14d的最高防效仅为34.70%。推荐田间轮换使用阿维菌素、溴氰虫酰胺、氟啶虫胺腈防治瓜蚜。
In order to select effective insecticides for the melon aphid Aphis gossypii,toxicity bioassay and field tests of six pesticides on this aphid were conducted.The toxicity test results showed that abamectin1.8% EC had the highest toxicity,with a LC50 value of 0.38 mg/L after 48 h.Spinetoram60 g/L SC showed the lowest toxicity,with a LC50 value of 2 225.63 mg/L after 48 h.The order of the toxicity of the six pesticides from high to low was abamectin,cyantraniliprole,sulfoxaflor,acetamiprid,imidacloprid and spinetoram.The field efficacy experiments showed that 3 000 times dilution of abamectin1.8% EC,2 000 times dilution of cyantraniliprole 10% OD and 4 000 times dilution of sulfoxaflor 22% SC had best control efficacy and persistent effect to the melon aphids.The control efficacies of them were all above 90% after application for 3-14 d,and there were no significant differences among them.3 000 times dilution of acetamiprid 20% WP and 3 000 times dilution of imidacloprid10%WP had poor control efficacy and persistent effect,with control efficacies of 31.31%,6.66% after 1 d,and57.39%,47.80% after 14 d,respectively.The control efficacy of the 1 000 times dilution of spinetoram60 g/L SC was the worst,with a highest value of 34.70% after 14 d.We recommend the rotation of sulfoxaflor,cyantraniliprole and acetamiprid for control of the melon aphid in fields.
出处
《植物保护》
CAS
CSCD
北大核心
2016年第5期230-233,253,共5页
Plant Protection
基金
北京市农林科学院科技创新能力建设专项(KJCX20140403
KJCX20150406)
北京市农业科技项目(20140105)
关键词
药剂
瓜蚜
毒力
生物测定
田间防治效果
pesticide
Aphis gossypii
toxicity
bioassay
field control efficacy
