Indoor Toxicity Determination of Four Chemical Agents Against Solenopsis invicta
[Objective]The pesticides that has good control efficacy and high lethality towards Solenopsis invicta were screened to provide theoretical basis for the scientific prevention and control of S.invicta.[Method]The toxicity of four chemical pesticides(40%dinotefuran,10%spinosad,15%indoxacarb and 70%imidacloprid)on S.invicta was determined by indoor toxicity testing,and the relationship among time,dose and mortality was analyzed.[Result]The toxic effects of the four chemical pesticides on S.invicta workers increased with time and decreased with concentration decreasing.Among them,40%dinotefuran showed strong toxic effects on S.invicta at various dilution levels,and its mortality rate was significantly higher than the other pesticides.The indoor toxicity determination revealed that the toxicity ranking of four chemical pesticides was 40%dinotefuran＞10%spinosad＞15%indoxacarb＞70%imidacloprid,with LC50 values of 2.652 mg/L,25.987 mg/L,33.980 mg/L and 358.474 mg/L,respectively.The strongest period for the mortality effects of 40%dinotefuran,70%imidacloprid and 10%spinosad on S.invicta workers were 3 to 12 hours after applying pesticides.[Conclusion]40%dinotefuran has high toxicity against S.invicta and has great potential of development and utilization in control of S.invicta.
Solenopsis invictachemical agentstoxicitylethal concentrationtime-dose-mortality model
NETL
NSTL
万方数据
