Field Efficacy Tests of Six Pesticides Against Spodoptera frugiperda in Guanzhong Area of Shaanxi Province

In order to investigate field efficacy of six insecticides, including 20% chlorantraniliprole SC, 15% indoxacarb SC, 5% emamectin benzoate EC, 4% emamectin·flucomuron ME, 10% emamectin·beetle hydrazine SC and 2.5% cyhalothrin ME, against Spodoptera frugiperda in Guanzhong area of Shaanxi Province, field efficacy tests of above six insecticides were carried out in corn field of Qianxian County, Shaanxi Province． Results showed that 20% chlorantraniliprole SC had the best control effect． Control effect was 82.66%, 87.09% and 94.95% respectively on the 3rd, 7th and 10th days after application． Control effect of 5% emamectin benzoate EC and 15% indoxacarb SC was second． 4% emamectin·flucomuron ME and 10% emamectin·beetle hydrazine SC had good quick-acting effect and poor late-acting effect on controlling Spodoptera frugiperda． 2.5% cyhalothrin ME had the worst control effect． In practice, 20% chloranacarbonamide SC, 5% aminoabamectin benzoate EC or 15% indoxacarb SC was recommended．