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Symptoms of seedling stage: The base of the embryonic stems is water-stained, develops rapidly, and trips down, causing the seedlings to die. Maturity: Generally more than the first on the ground fruit. At the beginning of the disease, a brownish brown spot develops and gradually enlarges, and the tip is sunken and the interior of the fruit becomes black and rot. When the weather is wet, the disease minister produces dense white wool. The onset of the leaves mostly starts from the edge of the leaf tip or leaf. The lesions appear dark green at the beginning and become brown afterwards. They are irregular. When wet, the diseased part also produces sparse white mold. Tender shoots showed water-stained appearance at the beginning, followed by browning and breaking, causing the upper branches to wilt and die.
Prevention and control methods 1. Agricultural control 1. Selection of disease-resistant varieties; 2. Crops with crops other than solanaceous vegetables and melons should be planted in crops for more than 3 years; 3. Choose land that can be easily drained, and deep-dip the land in winter. More organic fertilizer and phosphorus and potassium fertilizers; 4. Proper close planting, promptly blow the leaves to ventilate the field, on the field of rotten fruit, diseased leaves should be promptly cleaned and burned or buried; 5. Apply base fertilizer, timely fertilizer, increase application Phosphorus and potassium fertilizers to avoid partial application of nitrogen fertilizer.
Second, chemical control 1. Formalin soaked with liquid for 15 minutes, washed with water after sowing; 2. Seedling period selected 75% chlorothalonil WP 600 times, or 40% ethoxyaluminophosphate wettable powder 200 times liquid, or 65% Zeoxin WP 500 times. 7 days or so spray once, continuous 2 or 3 times; 3. Before the onset of the disease, use 25% metalaxyl WP 500 times or 80% triethylaluminum phosphate 600 times to irrigate the roots and irrigate every 10 days or so; 4 In the early stage of onset of spraying, commonly used agents include 72% dew wettable powder 800 times fluid, or 69% ank manganese zinc wettable powder 900 times fluid, or 40 ethyl aluminum phosphate wettable powder 200 times fluid, or 58% A Shuang Ling Mn-Zn 400 to 500 times liquid and so on. Each medication should use different types of agents.
Attention should be paid to the prevention and cure of eggplant blight
Eggplant blight occurs in the hot and rainy season from August to September. The high temperature and raininess in the full fruit period is also conducive to disease. The rainy season is long and the rainfall is heavy. In particular, it is even rainy, the weather is hot, and the onset is early and heavy.