Fungal diseases of roses.
Pathogens of fungal diseases are parasitic fungi that form a mycelium on plant surfaces or within their tissues. Under unfavorable conditions for the existence of fungi they do not die, and stored for a long time in the form of raids and rots. And mushrooms can be stored not only in the living tissues of plants, but also in dead plant debris, which can be a source of spread of the disease.
Therefore, a prerequisite for protecting roses from diseases is their prevention and timely recovery plants. To continue to have less problems, residues of the rosary, which usually hibernate harmful fungi necessarily destroyed. Otherwise, with the defeat of roses diseases in the previous season, their residues in the next season will be a source of new outbreaks of these diseases.
From fungal diseases rose sprayed (3-4 times during the growing season) Vitriol, Bordeaux mixture. Preventive spraying plants from diseases do in the spring as soon as possible, as long as the roses have not started to develop kidney. To do this, apply a 3% solution of Vitriol. Be particularly careful to be treated soil. If last summer fungal diseases in the rose garden was not, preventive spraying may be waived.
Varieties of roses whose leaves are not glossy or shiny and leathery, or dull, often suffer from fungal infections. Infection of plants comes from the soil during heavy rains in the hot weather. Therefore, if possible, in the summer the soil surface in the rosary should be zamulchirovat (eg mown grass mower chopped) - mulching both useful and beautiful.
Of fungal diseases the most common and very dangerous for the roses are infectious burn, powdery mildew, black spot, gray mold (the names of fungal diseases arranged according to their severity).