Even in hothouse conditions, cultivated crops can not be 100% insured against the occurrence of a disease. In addition, it is in the greenhouse that the disease spreads faster and it has to be twice as active as it is fighting it. To avoid such troubles, it is better to get acquainted with the list of diseases of tomatoes in the greenhouse and methods of struggle, as well as with preventive actions.
The most common diseases of tomatoes in the greenhouse
- Late blight of tomatoes in a greenhouse . It is a fungal disease that affects the entire aerial part of the plant. Especially badly affected are the green fruits. Recognize the onset of the disease can be on the brown spots that appear on the leaves. Then a white coating forms on the back of the sheet and eventually the entire green part turns yellow and falls off. Then the blight gradually shifts to fruits. It is the immature that give the greatest damage. As a rule, the beginning of late blight of tomatoes in the greenhouse provokes a strong temperature drop during the day and at night. Also important is the selection of seeds: it is better to use planting material three years ago. When planting, pay attention to specially developed hybrids, which even before the onset of the fungus will please you with a crop. For the prevention of phytophthora on tomatoes in the greenhouse, never thicken the planting, remove all old leaves, from the beginning of planting and before harvesting, feed with copper-containing and phosphoric-potassium fertilizers. Every two weeks you can water the leaves of Phytosporin.
- Vertex rot of tomatoes in the greenhouse . If you notice dull spots on green fruits, it is possible that you are experiencing this disease. Affects the vertex rot of the fruit of the first brush. Spots can be black or slightly glisten, have a characteristic smell of rot. The cause of this problem is a lack of moisture, too high levels of nitrogen and low calcium in the soil. Provide seedlings with systematic watering, especially during the hot season. Infected bushes can be treated with a solution of calcium nitrate. All the stained fruits must be removed and burned.
- Brown spot of tomatoes in the greenhouse . It is also called "leaf mold". The disease will make itself felt brown spots on the underside of the leaf. The spots have a slightly velvety gray coating. Gradually the infected leaves begin to dry up, then the entire plant dies. The disease spreads very quickly when watering. Ideal conditions for the appearance of brown spots - high humidity, watering with cold water and low temperatures at night. At the first symptoms it is necessary to exclude all three factors, to process plants with copper chloride. Also, the drugs Zaslon and Barrier are well established. For prevention, always disinfect land after harvest.
- Gray rot . Manifestations are very similar to late blight and gardeners often confuse these two diseases of tomatoes in
greenhouse. The epidemic begins at the end of the growing season, when the temperature drops significantly and the rainy season comes. On all fruits (ripe and green) there are spots. Gradually, brown watery dots form on spots. In addition to the fruit, this disease may well go to other parts of the bush. Immediately remove all affected parts of the plant, provide a higher temperature in the greenhouse and disinfect the soil after harvest. Diseases of tomatoes in the greenhouse often arise precisely because after the end of the season truck farmers do not put the soil in order. Ideally, it is necessary to remove the top layer of the earth and pour in fresh.