中国生物防治学报2024，Vol.40Issue(3)：532-541,10.DOI:10.16409/j.cnki.2095-039x.2024.01.009
不同致死浓度螺虫乙酯对丽蚜小蜂控害效果的影响
Effects of Different Lethal Concentrations of Spirotetramat on the Pest Control Ability of Encarsia formosa Gahan
摘要
Abstract
The sublethal effect of insecticides on Encarsia formosa Gahan is one of the main reasons affecting its parasitic ability.The aim of this study was to determine the sublethal effect of spirotetramat on the pest control ability of E.formosa.Population dynamics of E.formosa and parasitic ability of adults were observed and recorded in greenhouse cages with treatments of different lethal concentrations of spirotetramat to E.formosa using residue film method.After exposure to spirotetramat at LC50,the density of E.formosa pupae during vine stage-flowering stage dropped to 20.94 per 100 cm2 leaf,lower than that of the water-treated control.The density of eggs and high-instar nymphs Bemisia tabaci during vine stage-flowering stage reached 161.47 and 46.32 ind.per 100 cm2 leaf,higher than that of the water-treated control.After exposure to spirotetramat at LC10,the density of E.formosa pupae was only 38.14 per 100 cm2 leaf during vine stage-flowering stage,lower than that of the water-treated control.The parasitic rate of E.formosa on B.tabaci was about 60%on vine stage-flowering stage,significantly lower than that of the water-treated control.The temporal and spatial niche overlap indexes of E.formosa and high-instar nymphs B.tabaci were significantly reduced after exposure to different lethal concentrations of spirotetramat.These results show that pestcontrol potential of E.formosa is significantly inhibited when exposed to spirotetramat.关键词
烟粉虱/螺虫乙酯/亚致死效应/寄生能力Key words
Bemisia tabaci/spirotetramat/sublethal effect/parasitic ability分类
农业科技引用本文复制引用
羊绍武,张薄,田烨,陆园,陈国华,张晓明..不同致死浓度螺虫乙酯对丽蚜小蜂控害效果的影响[J].中国生物防治学报,2024,40(3):532-541,10.基金项目
云南省基础研究专项面上项目(202201AT070269) （202201AT070269）
国家自然科学基金(31760541) （31760541）
云南省中青年学术技术带头人后备人才项目(202105AC160071) （202105AC160071）
"云南省高层次人才培养支持计划"青年拔尖人才项目(YNWRQNBJ2020291) （YNWRQNBJ2020291）
