Comprehensive Management and Control Methods for Spinach Downy Mildew
Comprehensive management of spinach downy mildew means integrated management of spinach downy mildew. 1. Fertilizer and water management. Spinach prefers fertile, moist, cool conditions and dislikes drought and waterlogging; it is a fast-growing vegetable. Therefore, during the growing period, sufficient fertilizer and water must be supplied in a timely manner. From sowing to full emergence, the soil must be kept moist to ensure full emergence. At the 3-leaf stage, cultivate and weed, ...
Comprehensive management of spinach downy mildew means integrated management of spinach downy mildew.
1. Fertilizer and water management. Spinach prefers fertile, moist, cool conditions and dislikes drought and waterlogging; it is a fast-growing vegetable. Therefore, during the growing period, sufficient fertilizer and water must be supplied in a timely manner. From sowing to full emergence, the soil must be kept moist to ensure full emergence. At the 3-leaf stage, cultivate and weed to improve aeration and promote rooting; before the rows close, at the 6-7 leaf stage, apply fertilizer with irrigation, combining fertilizer and water to promote vigorous growth of spinach. Apply 10-15 kg of urea per mu. For the application method, apply dry and then water, or take advantage of the weather and apply during rain; after the rows close, if topdressing is needed, ammonium bicarbonate solution can be applied with irrigation. If drought occurs during the growing period, water frequently to maintain moisture. During continuous rain, drain promptly.
2. Pest and disease control. The main diseases of spinach are downy mildew and anthracnose, which mainly damage the leaves. The main pests are leafminers and aphids, which should be controlled with timely pesticide application. Control methods: For agricultural control, implement a 2-3 year crop rotation, maintain reasonable close planting, irrigate scientifically, keep the field clean, and promptly remove diseased plant residues. Chemical control: For diseases, spray with 64% Daconil 500x solution, 52.5% Yikuaijing 1500x solution, 70% thiophanate-methyl 700x solution, and other agents. For pests, spray with 75% Qianke 3000-4000x solution, 0.5% Haizheng Sanling 2500x solution, 15% Caixi 1500-2000x solution, 70% Aimeile 7000x solution, and other agents.
3. Timely harvest. When spinach plants grow to 35-40 cm, they can be harvested in a timely manner. During harvest, remove yellow leaves, withered leaves, and diseased leaves, then sell.