Powdery mildew on a rose: how to fight?

Do you know that there are two types of powdery mildew: real and false? This powdery mildew on a rose is due to a fungus pathogen. Usually it appears around the second half of the summer. The first signs of the disease is a whitish bloom on the buds, the leaves begin to wrap up, become thinner and begin to turn red. If no measures are taken to eliminate this disease, the white coating gradually covers the whole plant and becomes dense gray.

Powdery mildew on a rose hinders plant growth. It can occur because of a lack of calcium in the soil or because of the large amount of nitrogen. In greenhouses roses are affected by this disease due to poor airing and lack of light.

The control of powdery mildew should be carried out immediately, if the first signs of the disease occur. To do this, apply spraying with special preparations containing sulfur, apply a solution of soda, which added soap, or use fondozol.

Prevention is carried out in autumn. Fallen leaves are collected and burned, and the soil is dug. In the spring, when buds swell, rose bushes are sprayed with 3 percent iron vitriol.

Now let's consider such a thing as a downy mildew. This disease is characterized by the presence of specific spots on the upper side of the leaves, as well as peduncles. The spots have a brown, red or dirty-purple color. Gradually, the leaves turn brown and dry.

On the underside of the leaves, you can see areas with mold formation. False powdery mildew on a rose leads to falling leaves, shoots begin to rot and then die off. This disease poses a danger to flowers that are in enclosed spaces, in the open ground roses tolerate the disease more easily. This disease occurs due to high humidity, significant temperature changes during the day and night.

The remedy for powdery mildew is, above all, prevention. Fallen leaves and affected shoots must be collected and burned, the soil should be treated with special preparations. When the first signs of disease occur, plants are sprayed using such drugs as Bordeaux liquid, kuprozan, and ditane.

Powdery mildew on a rose can appear immediately in two manifestations, real and false. To combat these diseases, it will be effective to use sulfur with the M-45 ditan.

Even if you have never suffered from powdery mildew on the site of a rose, it will nevertheless be very useful to carry out prophylaxis. In order to rule out the disease of flowers, in the shady places it is necessary to plant seedlings that are most resistant to this disease. Watering and sprinkling flowers better in the morning, then excessive moisture will have time to evaporate for the day. In addition, there should be a certain distance between the rose bushes. Shrubs should not grow in close contact with each other. Feeding plants should be in strictly defined proportions.