Strictly rotating areas should not be rotated with Solanum vegetables. When conditions permit, the rotation should be more than 3 years.
Reforming cultivation practices: Select easily drained land for planting, deep-lying the exposed land after pulling, applying more organic fertilizer and P and K fertilizers; adopting high ridge cultivation, prohibiting flood irrigation, excessive precipitation, excessive water accumulation, timely removal, and proper cultivating Tear soil.
The medium-late-maturing varieties used in thinning and intercropping were controlled at a planting density of about 1500 to 2,000 plants per mu, and even about 1,000 plants were planted using single-stem pruning. It is also possible to intercropping dwarf bean, dwarf cowpea, summer cabbage, and other dwarf crops on the basis of wide ridges and sparse plantings, and still obtain good economic benefits.
Strengthen field management, timely cultivating and weeding, balance top dressing, and improve pruning and smashing.
Chemical control 1. That is, when the tomato seedlings colonization, with 70% thiophanate-methyl WP or 75% enemy powder powder dubbed 1:100, applied per hole or groove 75-100 kg. 2. When the onset of the disease can be used 25% metalaxyl WP 500 times or 80% aluminum phosphate 600 times Irrigation roots, in each near root irrigation liquid 150 ml, irrigation every 7 to 10 days. 3. Spray. At the beginning of the disease, it is protected by 1:1:200 Bordeaux spray; it can also be sprayed with 50% Alpha-Fe-Mn-Zn wettable powder 500 times, sprayed every 5-7 days, and sprayed 3 to 4 times depending on the severity of the disease. 4. Dip fruit. After the continuous rain, it will be carried out when the weather is fine. It can use 70% dexamethasone to fight 600 times wettable powder, plus 25% radomeril WP 800 times to make a mixture and coat all solanaceous fruit or dip. (Less severely old eggplant removed in advance). Although this method is expensive, it works well and can recover most of the losses.
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