Too damp soil or the period of incessant rains can become the reason of fungal defeat of garden and garden cultures. The most widespread disease of plants is the scab (phytophthora). To protect the green corner, it is necessary to know ways of fight against harmful disputes.
Concept and symptoms of phytophthora
The phytophthora most often affects the cultures of family of nightshade family (petunia, pepper, eggplant, tomato, potatoes, etc.). Quite often the apple-tree and pear are subject to fungus. The opacity of the site, the increased humidity and sharp temperature drops consider basic reasons of development of fungus.
Infection begins with emergence on leaves of plants and stalks of dark stains as if burned out by match. From reverse side of leaf it is possible to observe the whitish down similar to web from dust. In dry hot weather the specks dry up and become covered by dark crust.
Inflorescences begin to blacken and wither. Development dispute continues of 3-16 days, then the fungus actively breeds, leading to rotting of the infected cultures.
Neither the 30-degree heat, nor frosts are terrible to fungus. Disputes can be stored in tops of vegetable, the soil and fallen leaves several years, striking new crops and harvest. Therefore timely autumn cleaning of the site from the become obsolete plants and leaves has to become the first step in fight against infection.
Methods of fight and prevention
When landing sectional cultures try that bushes were not located too closely to each other, maintain distance not less than 1 m. During rainy season and at the increased humidity of times a week spray plants of 0.2% with solution of copper vitriol, combining with extra root fertilizing by nutrients. Do not overfeed cultures with nitrogen and phosphorus.
Places for storage of waste and leaves process 5% magnesium chlorate solution. When landing potatoes carefully touch tubers to exclude even small rotten speck. Before landing dig over the soil with lime at the rate of 500 g / 1 sq.m. As fertilizer use dark rerotten horse manure with chicken dung.
The infected leaves and fruits should be collected and burned at once. Preventive disinfecting is allowed by the resolved biological medicines-fungicides: Fitosporin, "Baktofit", "Barrier", etc. The fast effect in combination with the low level of toxicity allows to apply medicines without fear for health of harvest.