Field Efficacies and Joint Actions of Beta-cyfluthrin Mixed With Thiamethoxam or Tolfenpyrad Against Diaphorina citri (Hemiptera: Liviidae)
文献类型: 外文期刊
作者: Tang, Tao 1 ; Zhao, Mingping 2 ; Wang, Pei 1 ; Xiao, Yi 3 ; Huang, Shengkong 2 ; Fu, Wei 1 ;
作者机构: 1.Hunan Acad Agr Sci, Inst Plant Protect, Changsha, Peoples R China
2.Bur Agr & Rural Affairs Jianghua Yao Autonomous C, Jianghua, Hunan, Peoples R China
3.Tiger Forest & Paper Grp Co Ltd, Yueyang 414002, Peoples R China
关键词: Diaphorina citri; beta-cyfluthrin; thiamethoxam; tolfenpyrad; cotoxicity coefficient
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 6 期
页码:
收录情况: SCI
摘要: The Asian citrus psyllid, Diaphorina citri Kuwayama, is the most serious pest of citrus because it is a vector for the highly destructive citrus greening disease (huanglongbing, HLB). Currently, insecticide applications are being used widely to control psyllid populations, thereby suppressing the spread of HLB. In the present study, topical application bioassays were performed to detect the joint actions of beta-cyfluthrin and thiamethoxam or tolfenpyrad against D. citri adults in the laboratory. In 2019, a field plot experiment was conducted to evaluate the control efficacies of beta-cyfluthrin+thiamethoxam 22% capsule suspension and beta-cyfluthrin+tolfenpyrad 30% microemulsion against D. citri using foliar sprays. For the former, a 9:13 mass ratio had the highest synergistic effect, with a cotoxicity coefficient of 188.64. For the latter, a 5:25 mass ratio had the highest synergistic effect, with a cotoxicity coefficient of 153.94. A one-time foliar spray of the former at 30-40 mg/kg or of the latter at 40-60 mg/kg effectively controlled D. citri, with control efficacies varying from 80.1 to 99.4% or 80.4 to 100.0%, during the 3-30 d after treatment, respectively. Moreover, field observations indicated that these foliar sprays at the tested rates had no negative effects on citrus trees. Thus, foliar sprays of beta-cyfluthrin+thiamethoxam or beta-cyfluthrin+tolfenpyrad under the given conditions may control D. citri.
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