Tomato late blight, the treatment of which is a complex process and often does not end in success, is an extremely unpleasant disease and, even worse, very common. Trying to prevent it will be much more effective. Preventive measures should be taken during the entire growing season. First, crop rotation must be observed.
That is, planting nightshade - tomatoes, peppers, eggplant and potatoes - in the same place is possible only with a frequency of 3 years.
Deep digging in the fall can also help prevent a disease such as late blight of tomatoes. Treatment of tomatoes should begin immediately after the first signs of the disease are noticed. Usually, the fungus first affects the leaves, especially the lower ones. They begin to turn yellow and then dry. Further, the infection passes to the fruits, which blacken and rot, not having time to ripen. As soon as diseased leaves are noticed, they must be immediately torn off and burned. Tomato tops are burned in the fall in any case, even if the plants are not sick.
You can not plant tomatoes next to the potato field. Late blight is a disease that affects all nightshade.
Therefore, if a potato gets sick, tomatoes will be infected in a few days. Also, you can not plant tomatoes too thickly. This greatly contributes to the development of the disease. In the spring, you should definitely cover the bushes at night. This significantly reduces the risk of developing a disease such as late blight of tomatoes. Treatment, as mentioned above, is rarely successful, and protecting plants from sudden changes in temperature is one of the most effective preventive measures.
The disease more often affects nightshade nights in the rainy season. The fungus develops better in damp. Therefore, another preventive measure can be considered correct watering. It should not be carried out too often. It is only necessary to ensure that the soil under the plants does not dry out.
Late blight of tomatoes, which control measures include, inter alia, periodic spraying with suitable agents, very often affects weakened plants. Therefore, the beds must be weeded and loosened on time.
As for spraying, the safest composition is considered the infusion of garlic. At the same time, 1.5 cups of grated garlic, 2 tablespoons of grated laundry soap and 2 g of potassium permanganate are taken on a ten-liter bucket of water. Soap is added to keep the mixture better on the leaves and fruits. The consumption of this product is at least 1 liter per 10 square meters. m. Processing should be carried out 2 times a month. This tool helps even if the plants are already sick. Oddly enough, but the infusion of fermented mushrooms can also prevent such a fungal disease as late blight of tomatoes. The treatment in this case is the same spraying. That is, in the summer, having cleaned the mushrooms for frying, do not throw away the scraps. They are left to ferment for several days, dilute the resulting infusion with water (1x10) and process the plants. By the way, this measure also helps with powdery mildew.
Thus, late blight of tomatoes (photos of diseased plants you can see on this page) is easier to prevent than to cure. Take care of the plants correctly, observing all safety precautions, and you will probably be able to avoid such a nuisance.