Late blight: the methods of struggle and prevention

The Late – the terrible fungal disease that primarily affects Solanaceae (potato, tomato, eggplant, pepper, etc.). Causes the fungus Phytophthora infestans, which is added to the site most often purchased tubers or seedlings. Sources of infection can also be left for the winter the pile tops. The Spores of Phytophthora wintered, which cause disease on new plants. To deal with this infection is very difficult. It is easier to prevent its development.

Late blight, the methods of struggle which consist primarily prevention, affects plants mainly in the second half of the summer. Therefore, it is important not to miss the planting dates of potatoes. The best time – this is the second decade of April. Before planting, the soil must be loosen. Many gardeners during laying of tubers in the hole throw back handfuls of manure. In this case it is important to follow the dosage. The fact that the overabundance of nitrogen in the soil – one of the main reasons for the development of Phytophthora. Therefore it is not too much to fertilize the soil with manure.

Some surplus of potash and phosphate fertilizers on the contrary reduces the risk of such diseases as late blight. Methods of dealing with it is rather complicated and often ineffective. So another excellent way to prevent its development is the application to plot only the stable to her of sorts. It can be "paced", "Gatchina", "table 19," and others.

Often, late blight on potato is manifested in the case, if he is grown in the same place. In this case, gradually accumulate, infection significantly reduces productivity. It should also not be planted near potato field tomatoes. In the latter case can be affected both cultures. Roots before planting in a mandatory manner sorted, culling of all small, ugly and sick. It is best to sustain them for another week at a temperature of 16-18 grams. Celsius. During this period late blight spots become noticeable, therefore, to remove diseased tubers will be easy.

Late blight of potatoes most often affects it in a rainy and cool summer seasons. In this case you should reduce the amount of watering. It is very important to remove weeds that weaken plants, and carry out earthing up. A Thick layer of soil over the tubers will keep them fungal spores from the twigs and leaves.

If, however, late blight has affected your crops, you have a lot of painstaking work. First, you need to remove all the infected stems and leaves. Then the potatoes are treated with fungicides drugs. Also copes with this disease Bordeaux liquid. However, it is best to use new resources. The fact that late blight, the methods of combat which also suggest the use of copper-containing drugs, very quickly mutates and adapts to all applicable chemicals.

In some cases it will be useful, and environmentally safe microbial products of new generation. The principle of their action is extremely simple: the constituent bacteria in contact with the water are activated, and when applying the solution on the branches and stems begin to destroy the fungus. Rainwater they penetrate into the soil, helping to cleanse from the disease and tubers. Thus, it is possible to cope with the disease "late blight". Methods of dealing with it chemicals, of course, can be considered more radical. However, the use of microbiological tools will allow you to obtain uncontaminated with harmful compounds yield. In this case, the decision rests with the owners of the site.