2024 Author: Gavin MacAdam | [email protected]. Last modified: 2023-12-16 13:38
Powdery mildew is a nuisance that can affect almost any plant. Especially often this attack attacks a wide variety of fruit and berry crops. Currants are no exception, however, powdery mildew affects red and white currants less often than black ones. At the same time, some summer residents do not see the need to fight this dangerous ailment, and it is completely in vain, because over time, powdery mildew can lead to the death of plants
How to understand that it was powdery mildew that struck the currants?
To make the final "diagnosis" of plants, you just have to take a good look at them. When affected by powdery mildew on the shoots and currant leaves, the formation of a characteristic plaque begins, which has a whitish-grayish tint. And after some time, this plaque begins to gradually turn brown. A dangerous disease and growth points on the shoots are affected, as a result of which the shoots are deformed, and their development completely stops. The leaves become smaller, begin to curl and gradually lose their former green color, and the berries that have managed to take shape are covered with a dense bloom. If the berries have not yet had time to form, then they simply crumble. In general, currant bushes stop growing and begin to dry out slowly, and their frost resistance decreases many times over: even if the affected plant does not die from the disease itself, it is unlikely to survive the winter in any case.
How to fight?
The main method of dealing with powdery mildew is all kinds of spraying, so it is extremely important to learn how to carry out them correctly - ideally, each plant should be processed from all sides without exception, that is, it is important to try to wet all the leaves, not only from above, but also from below. It is best to use a spray gun or a soft brush for these purposes. As for the time of the spraying, the most suitable time for this will be late evening. In addition, plants should only be sprayed in dry weather! As a rule, spraying is carried out every four to seven days, until the moment the dangerous ailment is completely eliminated.
How to spray currants?
In modern stores, you can always find ready-made fungicidal preparations on sale, which are diluted and subsequently used in full accordance with the instructions. If you want to save money, it is quite possible to prepare spray solutions yourself. For example, you can treat currants with a composition prepared from ten liters of water and fifty grams of soda ash (this treatment should be carried out only after flowering), or dissolve one and a half grams of potassium permanganate in ten liters of water and spray immediately. The following composition also helps well in the fight against powdery mildew: three parts of water are combined with one part of the mullein, after which the mixture is infused for three days, and then diluted with water in a ratio of 1: 3 and the currants are treated weekly with the resulting composition.
You can also mix seven liters of water with three liters of whey and a teaspoon of copper sulfate, or dissolve a kilogram of sifted and clean wood ash in a bucket of water - in the second case, the ash mixture should be allowed to brew for several days, and then it is filtered, a small amount of laundry soap is added and immediately start processing.
If the treatment is planned to be carried out in the spring, even before the buds begin to bloom, then eighty grams of copper sulfate are diluted in ten liters of water. With this solution, it is necessary to process both the plants themselves and the ground under them.
Prophylaxis
Prevention should not be neglected - with the onset of autumn, it is extremely important not only to prune the berry bushes, but also to remove and subsequently burn all fallen branches with leaves, since the causative agent of a dangerous ailment can winter in them. And with the onset of early spring, berry bushes and the soil around them are treated with a solution of copper sulfate. In addition, in order to timely identify the ill-fated misfortune, all berry bushes must be regularly carefully inspected. If climatic conditions are also favorable to the development of powdery mildew, then it is best to try to give preference to varieties resistant to this disease - Agatha, Black Pearl, Dove, etc.
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