FEATURES OF THE SYSTEM OF PROTECTIVE MEASURES ON GRAPE PLANTATIONS AGAINST MILDEW IN THE CONDITIONS OF ODESA REGION

Abstract

Downy mildew is one of the most widespread specialized diseases of grapevines in terms of its distribution and harmfulness. The causative agent of the disease, the parasitic fungus Plasmospora viticola, has long been a parasite on wild grapevines in the southeastern part of North America. The distribution area of downy mildew is associated with high humidity conditions, and the disease is most dangerous in viticulture areas with high rainfall; in our conditions, the disease is mainly caused by fog and dew. Mildew can affect all green organs of the grape plant - leaves, shoots, antennae, inflorescences and bunches of grapes. The disease usually develops first on the leaves, which serve as a source of secondary infection of all other green organs.