Onions can be tasted in the ingredients to make the food quality better. Onion root rot is a common disease in the growth of onions. How to prevent onion root rot? Let's take a look at the small series of Huinong.
1. Onion root rot symptoms
Onion root rot mainly infects roots, and the initial expression is that the roots are water-soaked, and then brown spots are formed. After the disease, the onions do not grow new roots, and the plants are short, and the onions are swollen, which may even cause the onion plants to die.
2. Onset law of onion root rot
The root rot pathogen is highly virulent, can survive in the soil for a long time in the form of oospores and hyphae, and can survive the winter in the surface soil of 12-18 cm with the diseased body. When the spring conditions are suitable, the germs germinate to produce sporangia, invading or growing sprouts onions. In addition, sporangia and zoospores can also be produced on the diseased seedlings, which are spread by means of rainwater, irrigation water, contaminated manure, agricultural tools, seeds and the like.
3. Onion root rot prevention method
1 Before planting the onion seeds for disinfection.
Seed disinfection dose: a relatively low dose of the drug should be used. For example, 600-800 times of liquid carbendazim or 800-1000 times of liquid creamy carbaryl.
2 soil disinfection before planting.
Soil disinfection and seed disinfection use the same kind of agent. Soil disinfection is recommended to apply 1200-1500 times of liquid carbendazim or 1500-2000 times of liquid creamy carbaryl.
3 roots after onset.
The root irrigation is similar to the soil disinfection, and the application area is large, so the dosage is the same. It is recommended to apply 1200-1500 times of liquid carbendazim or 1500-2000 times of liquid creamy carbaryl.
How to prevent onion root rot is introduced here, and the prevention of onion root rot is done. The onion can stay away from root rot, allowing growers to increase production and income, and improve the economic benefits of onion planting.
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