First, the prevention and control measures of root rot of orchid beans
1, not suitable for rotation with leguminous forage.
Rotation: the host range of root rot pathogen of orchid bean is narrow, and rotation of orchid bean, wheat and rape should be carried out for more than 3 years to prevent soil from over-drying.
2. Strengthen field planning and management.
It is necessary to choose fields with high dryness and good drainage, avoid rainy and continuous time as far as possible when sowing, and implement quick irrigation and quick drainage to prevent the soil from being too wet.
3. Increase the application of phosphorus and potassium fertilizer
Help plants grow strong, improve disease resistance, use fully decomposed organic fertilizer or topdressing water-soluble fertilizer, it is not recommended to compost diseased plants, and clean the fields in time after harvest.
4. Seed treatment
Before sowing, seeds can be evenly mixed with Dixon 10 hour, or soaked with 700 times solution of 50% carbendazim wettable powder 10 minute, followed by soil disinfection, and mixed with fine soil for use in the evening. Spraying with water is not recommended to avoid seedling injury.
Second, the cultivation and maintenance of orchid beans
1, supplement water
Orchid beans are suitable for growing in a humid environment. In the conservation environment, natural water and purified water without pollution should be provided to keep the soil moist. In the process of watering, water can be directly poured into the soil, or water can be directly sprayed on plant leaves to keep the soil moist.
2. Fertilization
There is a great demand for nutrients in the growth process of orchid beans, so it is necessary to apply fertilizers scientifically in the maintenance process. For example, it is best to use nitrogen-based fertilizers in the vigorous growth period of orchid beans to improve the growth speed of orchids, and to use phosphorus and potassium fertilizers in the flowering and fruiting period to maintain high yield of plants.