Spinach planting techniques: how to prevent and cure spinach downy mildew?

How to prevent and cure downy mildew of spinach? Please introduce the causes and control methods of spinach downy mildew, which mainly harms the leaves and begins to produce light yellow irregular spots. After enlargement, the disease spots connect with each other. When the leaves are yellow and wet, the diseased leaves rot. There is a gray-purple mildew layer on the back of the diseased leaves, namely sporangia and sporangium peduncles. Spinach downy mildew mainly occurred on autumn-sown spinach or overwintering spinach plants overwintering with oospores in diseased leaves and became the primary infection source in the following year. Under suitable conditions, sporangia are produced, spread by airflow, and germ tubes are produced, which invade from the stomata and epidermis of leaves, and sporangia are produced in the disease area for re-infection. The disease is generally serious under the condition of low temperature and high humidity. The control methods of spinach frost berry disease are as follows: 1. Seriously diseased fields should be rotated for 2-3 years. Apply enough mature organic fertilizer to improve the disease resistance of the plant. Reasonable close planting, scientific watering, prevent flood irrigation, strengthen ventilation, reduce humidity. Clean the countryside, find diseased leaves or withered plants, and pull them out in time. When harvesting, remove the fallen leaves thoroughly and take them out of the field for deep burial or burning. 2. In the early stage of the disease, 90% of Yingshuangling wettable powder, or 70% ethyl manganese wettable powder, or 72% Kelu wettable powder, or 72% Kelu wettable powder, or 72% Kekangling wettable powder, or 50% Anke wettable powder, or 58% methyl frost manganese zinc wettable powder can be sprayed at the beginning of the disease. Or 72.2% propoxur water agent 600 times 800 times, sprayed once every 7 days, 2 times in a row. Pesticides should be used alternately to prevent drug resistance. Click to get more spinach planting techniques click to get more vegetable planting techniques