Effect of Treatment With 3-Octylthio-1,1,1-Trifluoropropan-2-One in the Diamondback Moth (Lepidoptera: Plutellidae) to the Toxicity of Diafenthiuron, Indoxacarb, and Bacillus thuringiensis
文献类型： 外文期刊
作者： Huang, Jingfei 1 ; Tian, Sufen 1 ; Ren, Ke 1 ; Chen, Yong 2 ; Lin, Shuo 2 ; Chen, Yixin 2 ; Tian, Houjun 2 ; Zhao, Jianwe 1 ;
作者机构： 1.Fujian Agr & Forestry Univ, Coll Plant Protect, 15 Shangxiadian Rd, Fuzhou 350002, Peoples R China
2.Fujian Acad Agr Sci, Inst Plant Protect, 247 Wusi Rd, Fuzhou 350003, Peoples R China
3.Fujian Key Lab Monitoring & Integrated Management, 247 Wusi Rd, Fuzhou 350003, Peoples R China
关键词： Plutella xylostella; 3-octylthio-1,1,1-trifluoropropan-2-one; diafenthiuron; indoxacarb; Bacillus thuringiensis (Bt)
期刊名称：JOURNAL OF ECONOMIC ENTOMOLOGY （ 影响因子：2.381； 五年影响因子：2.568 ）
ISSN： 0022-0493
年卷期： 2020 年 113 卷 3 期
页码：
收录情况： SCI
摘要： The diamondback moth, Plutella xylostella (L.), is a worldwide insect pest of cruciferous crops. Although insecticides have long been used for its control, diamondback moth rapidly evolves resistance to almost any insecticide. In insects, juvenile hormone (JH) is critically involved in almost all biological processes. The correct activity of JH depends on the precise regulation of its titer, and juvenile hormone esterase (JHE) is the key regulator. Thus, JH and JHE have become important targets for new insecticide development. Trifluoromethyl ketones are specific JHE inhibitors, among which 3-octylthio-1,1,1-trifluoropropan-2-one (OTFP) has the highest activity. The interaction effects between pretreatment with or combination of OTFP and the insecticides diafenthiuron, indoxacarb, and Bacillus thuringiensis (Bt) were investigated in diamondback moth larvae to determine OTFP's potential as an insecticide synergist. In third-instar larvae, both pretreatment and combination treatment with OTFP decreased or antagonized the toxicities of diafenthiuron, indoxacarb, and Bt at all set concentrations. In fourth-instar larvae, combination treatment with OTFP decreased or antagonized the toxicities of diafenthiuron and indoxacarb at all set concentrations. However, it increased or synergized the toxicity of Bt at lower concentrations despite the limited effect at higher concentrations. Our results indicated that the effect of OTFP on the toxicities of insecticides varied with the type and concentration, larval stage, and treatment method. These findings contribute to the better use of OTFP in diamondback moth control.
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