Summer and autumn corn are used as fresh corn. They are deeply loved by the general public. However, it is necessary to plant good corn in summer and autumn to prevent and treat corn diseases and insect pests in order to ensure high quality, high yield and commercial quality. 1. Prevention and control of corn quail: corn quail that damages high-autumn corn has two or three generations of corn sorghum and is mixed with sorghum strips. When it comes to prevention and control, we must adhere to pest control and pest management. In the early stage of egg hatching, use pyrethrin. Pesticides were sprayed at 1:800 to prevent and control the back of the corn leaves and the top and bottom of the ear of corn. The control was repeated 7 days after the generations overlap, and it was prevented 2-3 times. Ensure that the panicle rate is controlled below 5%. 2, corn, small spot disease prevention and treatment: high autumn, the temperature is below 25 degrees, large spot disease is very easy to occur, more than 25 degrees small spot disease is highly prone to happen, often cause the corn leaves from the lower part of the upward development, resulting in size Unequal lesions, and gradually shrinking and contracting, caused insufficient corn grouting, resulting in reduced production and loss of commodity value. Control methods: In the early stage of disease, use 50% carbendazim WP or chlorothalonil WP 1∶500 times to spray the entire plant, prevent it once every 7-0 days, and spray 2-3 times. 3. Prevention and control of corn rust: Rust mainly occurs in autumn corn. When the average temperature is 24-26 degrees and the relative humidity is 85%, it is easy to occur and spread. When the disease is popular, the back of the leaf is covered with rust spore cavity and rust spores. Photosynthesis causes insufficient grouting, resulting in reduced production and loss of commodity value. Control methods: At the beginning of the disease, use 15% triadimefon WP 1000 times solution or 70% mancozeb 1000 times solution plus 15% triadimefon WP 2000 times solution, spray 2-3 times. Achieve obvious control effect.