Abstract: This paper carried out comparative experiments on the efficacy of different pesticides against spodoptera litura in sweet corn grassland, judged the effect of pesticide control according to the test results, scientifically selected pesticide types and quickly controlled diseases and pests. In the process of modern agricultural production, it is necessary to adhere to the concept of scientific development, formulate reasonable prevention and control plans according to common diseases and pests such as meadow moth, prevent the wanton spread and development of diseases and pests, and ensure agricultural production and agricultural economy.