Tomato diseases can be prevented by using downy mildew Yijing wettable powder to treat tomato late blight, Dubao soluble powder to treat virus disease, Kedade suspending agent to treat bacterial wilt, and Shihuile suspending agent to treat gray mold and cotton rot. The picture of the disease is as follows:

1. Propionicillin WP for the treatment of tomato late blight: At the initial stage of the disease, 72% Propionicillin WP was diluted 800- 1000 times, and sprayed 1 time every 7- 10 days for 3-4 consecutive times.

2. Treatment of viral diseases with Dubao soluble powder: 40% Kedubao soluble powder can be mixed with 1000 times solution, and sprayed 1 time every 7- 10 days for 2-3 times continuously.

3. Chlorpyrifos suspension treatment: at the beginning of fruit, strengthen the inspection, once the diseased plants are found, immediately pull them out, collect them and burn them, spray 800 times 77% Chlorpyrifos suspension on the diseased areas and nearby plants, or sweep 800 times more than twice, every 7 7- 10/day 1 time, first dense and then sparse, and thoroughly drench them (.

4. The application of Le Hui suspension concentrate in the treatment of botrytis cinerea: At the initial stage of the disease, the disease should be controlled by continuous spraying. 40% Le Hui SC, 1000 times solution and other drugs for controlling gray mold are sprayed alternately or mixed for 2-3 times, and 1 time every 7- 10 days.

5. Control cotton rot together: generally, it is not necessary to control cotton rot alone, but it can be used in combination with tomato Fusarium wilt.