Xihong?{Pastutory disease is one of the major diseases of tomatoes. In general, it is very important to cultivate tomatoes in the open season in heavy rains, causing relatively large losses to production. Therefore, it is very important to prevent and treat tomato late blight.
Prevention of tomato late blight major measures:
1. Choose land that is high-dry, loose, fertile and well-drained.
2. The use of plastic film covering cultivation can effectively delay the occurrence of late blight.
3, with non-solanum crops for more than 3 years of rotation.
4, pay attention to cultivation and management, planting density can not be too large, ventilation should be timely, can not be too much water or too much nitrogen to make plants grow. Note the combination of nitrogen, phosphorus and potassium.
5. Spray 75% chlorothalonil WP 500 times solution, 40% phytophthoraxyl 200 times solution, and 600 times ash vaccine cream at the beginning of the disease. Continuous or alternating medication 4-5 times.
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