Eggplant brown streak disease
   The summer temperature is high, the rain is high and the humidity is very high, which is very beneficial to the occurrence of eggplant brown streak disease. The seedling stage causes the lack of plants, and the dark spots of the leaves occur in the adult stage. As a result, the disease causes the fruit to rot, and the prevention and treatment will cause serious losses to the vegetable farmers. Therefore, it is necessary to prevent early and early treatment of brown streak disease.
   The most suitable temperature for the development of eggplant brown smut is 28 °C ~ 30 °C, the relative humidity is above 80% , the high temperature and high humidity, the rainy rain, the repeated years, the density, the excessive application of nitrogen fertilizer, will cause the occurrence and prevalence of the disease. . The prevention methods are as follows:
   Agricultural control Seeds are soaked in water at 55 °C for 10 to 15 minutes before sowing , or soaked in formalin for 15 minutes, rinsed with water and germinated. Rotation with non-solanaceae crops for 2 to 3 years. Apply enough base fertilizer, increase the application of phosphorus and potassium fertilizer, and do not apply nitrogen fertilizer. When watering, it should be poured in small water, and the surface should be wet. Reasonable close planting, timely pruning and snoring, improve ventilation and light transmission in the field.
   Chemical control sowing per square meter with 50% carbendazim WP 10 grams, 10 grams of 50% thiram wettable powder, mixed fine soil mixed with 2 kg of soil made drugs, taking 1/3 sprinkled Qimian Sow, then cover the remaining soil on the seeds.
   In the seedling stage, 50% captan 400 times solution or 60% fumei zinc 500 times solution can be sprayed . After planting, it can be sterilized by planting ash or lime powder at the base of the stem. In the result period, 40% Fuxing 5000~6000 times liquid, or 80% Xinwansheng wet powder 500~800 times liquid, or Wanmuling WP 500~800 times liquid, or 43% Fu Li library 4000 times can be sprayed. liquid. Every 7 to 10 days, spray, spray for 2 to 3 times. In order to prevent drug resistance, the above pesticides can be used interchangeably.
   (He Yunxian County Science Association Chen Yunqi )
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