Tomato leaf curl disease is not OK to hit beer?

Beer can be used, single use does not cure the disease, first see if there are insects, in the WeChat, plant-derived biological plant protection, is a good common good, there is a special talk about the treatment of leaf curl virus, the method plan is used directly, the effect can be seen clearly.

If the sub-tomato leaf curl disease is not cured by beer, pesticides must be used to cure diseases and pests.

Tomato leaf curl is an aphid in the activity, and it is okay to spray it with garlic water, but I haven't heard of beer.

As the temperature rises, especially in summer, the temperature is relatively high, and the pesticide damage will occur if you are not careful when spraying, once the drug concentration is too large, the pesticide damage occurs, the surface of the leaf will change color or have spots, and the leaf will also curl upward.

If the crop uses too much fertilizer, it will lead to an increase in the concentration of soil solution in the root system, which will hinder the absorption of water by the root system, resulting in water shortage in the leaves, causing the leaflets to flip and roll up. For example, when too much ammonium nitrogen fertilizer is applied in the soil, the midribs of the small leaves on the mature leaves are raised, and the leaflets show an inverted bottom shape, and the leaves appear to turn up and roll. Especially in saline-alkali areas, when the salt concentration of soil solution is high, it is also easier to curl the leaves upward.

When the plant is deficient in calcium and some trace elements, it can cause leaf curling symptoms. These are physiological leaf curls, often distributed on the leaves of the whole plant, not accompanied by the symptoms of bright veins mosaic leaves, often occur on the leaves of the whole plant, it is recommended to use Yanwo chelation in the trace element water-soluble fertilizer, rich in a variety of nutrients, not antagonistic, good absorption, effectively alleviate the physiological diseases caused by the lack of nutrients in vegetables, promote the growth of vegetables, and improve the stress resistance of vegetables.

Vegetable topping is too early, which is easy to breed bacteria in the axillary buds, and the phosphoric acid in the vegetable leaves has nowhere to be transported, resulting in the first aging of the lower leaves and the shrinkage of the leaves. If the crop is planted too early and pruned too heavily, it will not only affect the development of the underground root system, limit the quantity and quality of the root system, but also make the aboveground part grow poorly, affect the normal growth and development of leaves, and induce leaf curling.

Viral diseases can generally be transmitted by aphids, whiteflies, etc. When the plant has a viral disease, all or part of the leaves will appear from top to bottom and curl upward, and at the same time, the leaves will fade green, become smaller, shrink, clump and other phenomena, and in severe cases, there will only be leaf veins and no mesophyll, which is mostly manifested in the heart leaves and upper leaves.

Tomato leaf curling disease is often caused by infection with pests and diseases, spraying potassium permanganate 1000 times in the early stage of the disease; Use 10% net 1500 2000 times liquid to kill poisonous aphids and whiteflies.

Tomato leaf curling disease is a common disease in the process of tomato planting, which can easily lead to less and smaller tomato fruit per plant, which affects the economic income of farmers planting tomatoes. Viral diseases are easy to cause tomato plants to roll up leaves, the leaves are curled and clustered, and in severe cases, there are only leaf veins and no mesophyll, and viral diseases are transmitted through contact with poisonous aphids, whiteflies or sap, and high temperature and drought are conducive to its occurrence.

In addition, when the temperature is higher than 30, tomatoes will grow slowly, increase photorespiration, and affect nutrient accumulation. When the temperature was higher than 35, the transpiration rate of the leaves accelerated, and the water transport rate of the roots was not synchronized with the transpiration rate of the leaves. For the production of tomatoes in the protected area, shade nets should be erected in a timely manner, greenhouse vents should be increased, and insect nets should not be removed.

Spraying 6000 times the liquid can alleviate the symptoms of leaf curling.

The fertilization program is based on the target yield of tomatoes, and the amount of one application should be determined based on the current number of ears. Excessive irrigation and fertilization can lead to excessive fertilizer concentrations in the local soil, root burns, and leaf margin blight. Rational fertilization and control of the amount of water-soluble fertilizer are important measures to reduce the harm of fertilizer.

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Tomatoes have leaf curling disease, what kind of pesticide should be used to hit it?

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In the early stage of tomato leaf curl disease, 500 times of 20% morpholinoguanidine hydrochloride copper acetate wettable powder, 1000 times of phytolingling emulsion, 500 times of 3 azazole riboside (32% nucleoside bromomorphoguanidine) aqueous solution, 2% Ningnanmycin aqueous solution 150 250 times and other fungicides can be sprayed, sprayed once every 5 7 days, and sprayed 2 3 times in a row.

If you can't buy these medicines, what else can you use to replace them.