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Efficacy of Chlorfenapyr and Abamectin to control of Tetranychus urticae Koch (Acari: Tetranychidae)

Abstract:

Efficacy of Chlorfenapyr and Abamectin to control a Tetranychus urticae population was determined under laboratory conditions (27 ± 2 °C, 70 ± 10% R.H.). The population was collected in tomato plants (Lycopersicon esculentum L.) in "Guadalupe", Jimenez County, Lara state. At the laboratory effect of different Chlorfenapyr (37, 75, 150, 300, 600, 1200 and 2400 ppm) and Abamectin (1,6; 2,3; 3,2; 4,5; 6,3; 8,8 and 12,4 ppm) concentrations was evaluated using disk leaves immersion technique. LC50 values obtained for Chlorfenapyr and Abamectin were 59.34 and 1.50 ppm, respectively and they are lower than recommended field dose. Chlorfenapyr showed to be more effective in to control T. urticae, however effect on benefical fauna should be evaluated. Field studies to validate results herein obtained are required.