The diseases that can occur during the planting process of spinach include smashing disease, heart rot, downy mildew and viral disease. The Huinong School has sorted out the damage and prevention methods of the above diseases on spinach. The following is for your reference.
The harm of spinach smashing disease: Generally, the incidence of spinach seedlings is more. After the spinach leaves are unfolded, the disease is observed. The base of the spinach seedlings is light brown water stains. After the root rot occurs, the spinach seedlings have not withered and have collapsed. When the humidity is high, the disease minister produces a layer of white cotton-like hyphae, which is rapidly expanded at low temperature and humidity.
Prevention and treatment of spinach smashing disease: spray with 58% of the nail Mn-Zn wettable powder 800 times solution, or 72.2% Plex water agent 400 times.
The harm of spinach heart rot: heart rot mainly harms the stem base of spinach, leaves, stems and roots can be harmed. The spinach that is seed-borne is not infected after germination, and some of the unearthed seedlings rot and some stems change. Brown, curled up, causing tripping, resulting in lack of seedlings and ridges.
Prevention and treatment of spinach heart rot: In the early stage of the disease, spray with 36% thiophanate-methyl suspension or 500 times solution of 72.2% Plex.
The harm of spinach downy mildew: Downy mildew mainly harms the leaves of spinach. The disease class begins to show a pale yellow spot, and the edge is not obvious. Gradually, the gray-white mildew layer is formed on the leaf back lesion, and the grayish purple layer is formed in the later stage. The lesion spreads upward from the lower part of the plant. It spreads mainly through airflow, rainwater, agricultural tools, insects and farming operations. The temperature is high under the conditions of low temperature and high humidity of 10 ° C and relative humidity of 85%.
Spinach downy mildew prevention and treatment method: in the early stage of spinach, use 58% of the nail Mn-Zn WP 500 times solution, or 75% chlorothalonil WP 600 times, or 75% of DuPont condensate WP 800 times Liquid spray.
Harm of spinach virus disease: Viral disease is a major disease of spinach. After the onset of viral disease, the leaves are shrunk, the leaf shape is small, some of the heart leaves are twisted, and the new leaves turn yellow. Aphids and planthoppers are the main routes of viral disease transmission.
Prevention and treatment methods of spinach virus disease: 1. Control aphids in time and reduce the spread of mediators. 2. In the early stage of spinach, spray with 1.5% phytopathogenic emulsion 1000 times solution or 20% virus A wettable powder 500 times solution.
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