9种杀虫剂对玉米大豆带状复合种植大豆田甜菜夜蛾的防治效果.

In order to investigate the effect of insecticides on the control of Spodoptera exigua in corn-soybean banded composite planting soybean fields, nine kinds of insecticides were selected to carry out the screening test, and the results showed that the test agents of the treatments were safe for soybean plants; the spraying of 6% ethyl polymyxin SC 450 mL/hm², 20% polymyxin SC 4mL/hm², 5% broflanilide SC 450 mL/hm² had a better control effect on the Spodoptera exigua in corn-soybean banded composite planting soybean fields, the prevention effect reached 65% 1 d after the drug.3 d after the drug reached more than 85%, 7 d after the drug reached more than 90%. The control effects of the above three treatments were significantly higher than those of other treatments, and the three treatments had rapid efficacy, which could significantly reduce the population size of the Spodoptera exigua in a short period of time. This study monitored the occurrence of Spodoptera exigua in Binhuai farm area in August 2022, which provides a basis for scientific prevention and control of Spodoptera exigua in large-scale production of corn-soybean banded compound planting. [ABSTRACT FROM AUTHOR]