Laboratory Toxicity Determination and Field Control Effectiveness Evaluation of 12 Different Pesticides on Tomato Leafmoth Larvae
To select effective pesticides for controlling tomato leaf moth larvae in actual production,the larvae of the tomato leafmoth were used as research material.Twelve different pesticides were evaluated for their laboratory toxicity by the leaf-dip method and for field control efficacy by the spraying method.The results showed that 2%methylaminoavermectin benzoate emulsion had the strongest lethal effect on tomato leafmoth larvae,with an LC50 value of 0.046 8 mg/L.Also,6%Avi chlorobenzoyl suspension,35%chlorantraniliprole aqueous dispersible granules,and 60g/L ethyl polyfungicidalin suspension showed extremely high insecticidal activity against tomato leafmoth larvae,with LC50 values of 0.058 6,0.106,and 0.225 mg/L,respectively.In the field control experiments,6%Avi chlorobenzoyl emulsion,60g/L ethyl polyfungicide suspension and 2%methylaminoavermectin benzoate emulsion performed well,achieving maximum control effects after the second application,with control efficacies of 92.46%,91.76%,and 90.64%,respectively.Despite its strong laboratory toxicity,the 35%chlorantranilamide aqueous dispersible granules performed poorly in field control.It is recommended to use 6%Avi chlorobenzoyl emulsion,60g/L ethyl polyfungicide suspension and 2%methylaminoavermectin benzoate emulsion for the control of tomato leafmoth larvae in actual tomato production.
万方数据
维普
