Tomato planting techniques: what diseases should be controlled when planting tomatoes in summer?

What diseases should be controlled when planting tomatoes in summer? Please guide the summer planting tomato to control the following diseases for reference: virus disease: high temperature and drought are the first conditions for the disease. The suitable onset temperature of virus disease is between 38 and 43 ℃. It is not conducive to the occurrence of virus disease if it is lower than 35 ℃ or higher than 45 ℃. In the daily cultivation management, artificially regulating the temperature can seek advantages and avoid disadvantages, and the specific measures are as follows: timely watering: from seedling planting to the middle stage of fruit setting, the surface moisture in the greenhouse should be kept moist, the surface water content should not be less than 75-80%, and the air humidity in the greenhouse should not be less than 70%. Temperature control: adopt the management method of connecting the greenhouse film at night (under the condition of no rain at night) and taking shade and shelter from the wind at noon, especially when the light intensity is strong at noon, shade and shelter should be taken earlier. The main purpose is to ensure that the air in the shed has a high water content, and to reduce water evaporation, to ensure that the young leaves and growth points of plants will not wilt due to water transpiration, and to prevent the leaves on both sides of the tuyere from dying and scorching due to strong direct light. the main methods are as follows: (1) use hand pressure sprayer or motor sprayer to replenish water in time. (2) the use of sunshade net for physical prevention and control, generally pull up the sunscreen at 10:00 every morning, and see the light after 5pm, which can effectively control the occurrence of virus disease. Chemical prevention and control: two formulations are recommended for reference: Kangwei 25ml plus medical virulence 15 tablets plus Fengshou No.1 15ml plus natural brassin 2.5g to evenly spray plants on 15kg water; another formula is: Fengshou No.1 15ml plus medical ribavirin 15 tablets plus agricultural streptomycin 3g plus zinc sulfate plus naphthalene acetic acid 20PPm sprayed plants on 15kg water. Budding blight: it is a physiological disease, which is greatly affected by climate, in which high temperature and drought are the main factors. The symptoms are as follows: the growth of the growth point is obviously inhibited and spherical, and the leaves grow rapidly transversely and the branches and leaves are hypertrophic under the first inflorescence. Prevention and treatment methods: ⑴ uses sunshade net to avoid strong light. Methods the same as the physical prevention and control method of viral disease; ⑵ regulation method: using 920g growth regulator 1g to 35kg of water, spraying quickly and evenly on the top of the plant, the cure rate was more than 95%. ⑶ can spray Fengshou No.1 conditioner properly. Click to get more tomato planting techniques click to get more vegetable planting techniques