Late blight is one of the most unpleasant problems in tomato beds. The disease appears quickly – dark spots appear on the leaves, then the stems and fruits are affected. The fungus develops especially actively in cool and humid weather. Therefore, many summer residents try to protect plants in advance, using simple preventive methods.
One of the popular folk methods is treating tomatoes with whey. Gardeners have been using this method for many years. It is believed that the serum helps create a thin protective film on the surface of the leaves, which prevents the development of fungus.
It works quite simply. Whey contains lactic acid and beneficial bacteria. They create an acidic environment in which it is more difficult for fungal spores to develop. Therefore, many summer residents use serum to prevent late blight.
Most often, the solution is prepared as follows: 1 liter of whey is diluted in 9–10 liters of water. The resulting mixture is sprayed onto the bushes or watered at the roots of the plants in small portions – about a glass per bush.
Treatment is usually carried out once every 7–10 days, especially during rainy weather. When used regularly, this method helps reduce the risk of late blight and keep the tomato crop healthy.
