Bt工程菌WG-001与化学杀虫剂复配最佳配方筛选及田间防效研究  

Screening of optimum proportion and field effect of mixtures of Bt engineering strain WG-001 and chemical insecticides against Plutella xylostella

作　　者：张聪冲[1] 邱浩[1] 覃春华[1] 游红[1] 李建洪[1] 

机构地区：[1]华中农业大学植物科学技术学院,武汉430070

出　　处：《应用昆虫学报》2011年第2期313-318,共6页Chinese Journal of Applied Entomology

基　　金：公益性行业(农业)科研专项(200803001)

摘　　要：为了延缓小菜蛾Plutella xylostella(L.)抗药性的产生和发展,筛选Bt工程菌WG-001与化学杀虫剂的最佳复配配方,本研究采用浸叶法分别测定了Bt工程菌WG-001与茚虫威、丁醚脲和巴丹复配对小菜蛾的增效作用。结果表明,当Bt工程菌WG-001与茚虫威以有效成分之比为100.10∶0.72复配时,增效作用最强,共毒系数为178.05。而Bt工程菌WG-001分别与丁醚脲和巴丹复配表现相加或拮抗作用。田间试验结果表明,Bt工程菌WG-001与茚虫威以100.10∶0.72的有效成分之比进行复配后,药后7d,500倍液对小菜蛾的平均防效为84.88%,显著优于Bt工程菌WG-001和茚虫威单用的平均防效。The relative effectiveness of mixtures of the Bt strain WG-001 with the pesticides indoxacarb,diafenthiuron and cartap for controlling the diamondback moth（DBM） Plutella xylostella（L.） was determined using the leaf-dipping method.The results indicate that a 100.10：0.72 mixture of Bt strain WG-001 and indoxacarb was the most synergetic with a co-toxicity coefficient（CTC） of 178.05.Mixtures of Bt strain WG-001 with diafenthiuron or cartap had an additive or antagonistic action,respectively.Results of a field trial showed that the average control effect of a 500 times dilution of the Bt strain WG-001 and indoxacarb mixture was 84.88% 7 days after treatment,significantly higher than using either Bt WG-001 or indoxacarb separately（P〈 0.05）.

关 键 词：苏云金芽孢杆菌工程菌WG-001 茚虫威 小菜蛾 增效作用 田间防效 

分 类 号：S482.3[农业科学—农药学]