If black spots appear on the leaves, stems and fruits of your tomatoes and potatoes, probably the plants are attacked by potato mildew.
Do not despair, we’ll give you some tips on how to deal with phytophthora. This is a common fungal disease that primarily affects crops of the Potato family, most often occurring in cold and wet weather. Spores of potato manna may be in the ground, by seeds, plant debris and garden inventory. In order to prevent spores from spreading in the plants, preventive measures are necessary.
Prevention of phytophthora –
1. Diseases of the disease prefer a damp environment, so it is important for plants to be spiced moderately and to avoid highly compressed plantations. Potatoes and tomatoes should be watered in the morning so that much of the moisture has absorbed into the soil by the end of the day. When growing in a greenhouse, ventilation is a must. In addition, humidity is often increased during rapid temperature changes. At the end of summer, when it is still hot but cold.
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2.Wealthy plants are susceptible to any infection. Therefore, tomatoes and potatoes should receive enough trace elements – iodine, manganese, copper, phosphorus and potassium.
3. In order to strengthen the immune system of the plants, rotation must be observed. Good precursors of potatoes are cucumbers, zucchini, pumpkins, patties, cabbage, legumes, root vegetables and onions, and for tomatoes – cabbage and cauliflower, cucumbers, zucchini, pumpkins, legumes, onions, root vegetables.
4. Preventing the development of this disease is possible thanks to the cultivation of varieties and hybrids that are resistant to fungal diseases.
Chemicals against phytophthora are quite effective, but are not recommended for use when ripening. Therefore, in the second half of summer it is better to spray the plants with biological preparations.
We offer you one of the most effective and time-tested traditional recipes with which our grandmothers have saved their gardens.
Ingredients of garlic with potassium parmigranate
100 grams of garlic (you can use bulbs, stems and leaves) are ground and poured with 1 cup of water and left for one day. The liquid is then strained and added to 10 liters of water and 1 gram of potassium permanganate. The resulting solution is sprayed on the plants every 10-15 days. About a half liter goes to a bush of tomatoes or potatoes
Whey in July
Whey is grown with water at a ratio of 1 to 1 and from the beginning of July this mixture is sprayed every 2-3 days.
Wood ash can be dissolved in water, adding liquid soap and spraying potatoes and tomatoes with this mixture.
In 10 liters of water, pour into 1 liter of skim milk and add 15 drops of iodine. With the resulting solution, the plants are sprayed every 2 weeks. This iodo-milk preparation not only kills bacteria but also accelerates the growth of green pets.
With yeast for bread
In 10 liters of water, dissolve 100 grams of yeast for bread. This preparation treats potatoes and tomatoes at the first sign of phytophthora.
1 liter of fermented yogurt staying for two days is diluted with 10 liters of water. With the resulting solution, the plants are sprayed every two weeks after they are planted in a permanent place. If the summer is wet, the manipulation is done every week.
100 g of dry (or 150 grams fresh) horsetail is added to 1 liter of water and boiled under low heat for 30 minutes. Then decant the broth with 5 liters of water, spraying the plants every 10-14 days.
To protect vegetables from potato manna you should use some of these methods or combined, not when the signs of the disease appear, but much earlier. The first time potatoes are sprayed at the beginning of buds, and the second time in 10-14 days. The same goes for tomatoes. This results in the plants spraying on average 4-5 times in 10-15 days during the summer.
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