How to prevent and defeat the tomato in summer

It is hot and rainy in summer, and there are many diseases in tomato, and the loss is serious. In order to ensure the safer summer of the tomato, it is beneficial to the second result in the fall. During the summer period, the “two reforms and three timely” management measures should be taken to prevent defeat.

First, change the cultivation method. In order to prevent and control summer rain soaking, it should be changed to simmer. If it has been planted in the flat, it can be combined with the soil, and the heart will be turned into a back, and the back of the ridge will become a heart. Generally, it should be completed in 2 to 3 times to prevent excessive soiling and affect the ability of roots to absorb fertilizer. After the soil is cultivated, the amount of roots increases, the ability to absorb nutrients is accelerated, the plants are robust, and the disease resistance is enhanced. Due to the uniform distribution of the upper and lower layers of the root system, the influence on the root system when the temperature of the surface is changed can be reduced, which is beneficial to the strong and strong resistance.

Second, change the technology. In order to make the tomato unbeaten in summer, the traditional single-dry or double-dry pruning method should be changed to a new eccentric picking technique. The new pruning method is: when the first inflorescence or the second inflorescence is set, the second inflorescence or the third inflorescence appears, and the first lateral bud that grows under the second inflorescence replaces the trunk, and also causes two or three to be born. After an inflorescence, a side bud is selected as the main stem in the middle of the trunk. Such continuous topping of the heart, the role of stimulating plant regeneration, so that the plant is not unsuccessful in summer, more fruit, high yield. î—¥

(1) Timely water supply and fertilizer. Hot summer, timely supply of tomato water and fertilizer, is an important measure to prevent and defeat. The field suddenly wets and wets, and after the rain, it will cause a lot of death. Therefore, the soil moisture in the field should be basically the same, usually watered once every 7 days. At the same time of timely water supply, it is also necessary to apply a quick-acting nitrogen fertilizer such as urea or ammonium nitrate every 15 to 20 days, and apply about 5 kg per mu. At the same time, the potassium dihydrogen phosphate should be sprayed on the leaves to make the plants Strong seedlings are not long.

(2) Timely prevention of pests and diseases. The disease of tomato during summer is mainly caused by disease and virus disease. Spray 1:1 carbendazim and dexamethasone 500 times mixture for 10 to 15 days, or spray 1:1 methyl thiophanate and 800 times mixture of cytotoxic bacterium. it is good. For viral diseases, spray 40% dimethoate emulsion 1500 to 2000 times to kill aphids in time to prevent transmission. Before the onset, spray 0.1 to 0.3% potassium permanganate solution every 7 to 10 days to prevent viral disease. The pests that harm tomato during the summer period mainly include cotton bollworm, corn borer and other drill hazards, causing plant death. At the peak of their spawning, timely spraying of dimethoate, trichlorfon, and pyrethroid insecticides can prevent damage.

(3) Discharge water in time. Tomatoes are moist, afraid of flooding. In the hot season, watering should be accompanied by pouring in the morning and evening, reducing the ground temperature and reducing the disease. In particular, water accumulated after the rain will suffocate the root system or induce the occurrence of bacterial wilt.

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