Most of the eggplant diseases occurred in the hot and rainy season in August-September. The high temperature and raininess in the high fruit period is also beneficial. 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.
Symptoms: Seedling stage: The base of the embryonic stem becomes water-stained, develops quickly, 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 inside of the fruit is 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. Onset of tender shoots, water stains, and then become brown, resulting in broken, the upper branches of wilting dead.
Control methods:
Agricultural control:
1. Choose disease resistant varieties;
2. In the field of disease, crops other than solanaceous vegetables and melons should be rotated for more than 3 years;
3, choose to easily drain the land for planting, while deep-turning the land in winter, apply more organic fertilizer and phosphorus and potassium fertilizers.
4ã€Appropriate close planting, promptly blow the foot and leaves to ventilate the field, and timely clean up and burn or bury the rotten fruit and diseased leaves in the field;
5. Apply base fertilizer, apply fertilizer in a timely manner, increase application of phosphorus and potassium fertilizer, and avoid partial application of nitrogen fertilizer.
Chemical control:
1. Soak the seed with formalin for 15 minutes, wash with water and sow;
2. Seedling stage use 75% chlorothalonil WP 600 times, or 40% EB aluminum wettable powder 200 times, or 65% dexamethasone wettable powder 500 times. Spray once every 7 days for 2 to 3 consecutive times;
3, before the onset of the disease, use 25% metalaxyl WP 500 times solution or 80% triethylaluminum phosphate 600 times to irrigate the roots, once every 10 days or so;
4. In the early stage of onset of spraying, commonly used agents include 72% dew wettable powder 800 times, 69% ank manganese zinc wettable powder 900 times, or 40 ethyl aluminum phosphate wettable powder 200 times, or 58%. Metalaxyl Mn-Zn 400 to 500 times liquid and so on. Each medication should use different types of agents.
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