Spinach downy mildew mainly damages the leaves. The disease is seriously affected by high planting density, poor field ventilation, low waterlogging, low temperature and high humidity. Control methods:
1. Timely soil preparation and application of organic base fertilizer after drying in the sun. And spray the effective agent for soil treatment, and spray 800 times the new high-fat film spray, so that the effective utilization of effective pharmaceutical ingredients. To select excellent disease-free varieties, and seed soaking and seed coating agent + 800 times the new high-fat film seed dressing treatment, can repel underground pests, effectively kill harmful bacteria, isolate virus infection, does not affect the germination and swelling function , Strengthen breathing intensity, increase seed germination rate, timely sowing, reasonable close planting.
2, seedlings should pay attention to reasonable irrigation topdressing, NPK ratio should be a reasonable match, and timely spraying strong stalk, promote healthy growth of plants, improve disease resistance, promote leaf hypertrophy, fresh leaves color, natural taste. 3, chemical control: the early onset of alternate spraying 90% of the phosphorus alginate 800 times + potassium permanganate 1000 times + 800 times the new high-fat membrane 3-4 times to reduce the downy mildew transmission.
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