Green Onion Rotten Root

Baixiang County is a traditional scallion plantation county. Over the years, there has been the habit of planting green onions. The price of scallion has been good in recent years. The enthusiasm of farmers for planting onions is high. However, the recent continuous rain, many green onion growers found that slow growth after onion cultivation, dry yellow tips, open the ridge, and found that some green onion root rot, how is this going on? The green rot on the roots of black scallions rots due to root rot.

Heavy weighting is a key factor that causes root rot of green onions. Due to the continuous cultivation for many years, the number of pathogenic bacteria in the soil has increased, and diseases caused by heavy pods have been unavoidable, and it is very easy to cause rot of green onions. Affected by the continuous rainy weather, the soil moisture is too large and the air permeability is reduced, affecting the normal breathing of the roots, and the plant's own resistance declines. If the soil is cultivated at this time, resulting in a large number of wounds, pathogens can be used organically, which intensifies the occurrence of diseases.

For the prevention and treatment of root rot of green onions, the author believes that the onion root is buried deep after cultivating green onions and the rooting of the onion after the onset of the disease is not effective. Therefore, the prevention of the early stage is the key.

Before cultivating soil with green onions, biofungus can be applied with water to increase beneficial bacteria in the soil and inhibit the infection of pathogens; or 58% of metalaxyl manganese zinc 600-800 times or 70% of cymoxan 800-1000 Doubling the roots; or in the ditch spread soil bacteria poison net (enexone + hymexazol), an average of 1 mu of land 2-3 kg, and then earth. After earth-cultivation, if a diseased plant is found, it is necessary to promptly break the ridge and apply 72% Prec 800 times liquid + 96% hymexazol 3000 times liquid + rooting agent.

In rainy days, it is necessary to pay attention to the drainage of large fields, to avoid the rooting of water and to induce root rot. For pests such as cockroach and green onion, insecticides such as phoxim particles can be used for control. The land that has been planted with green onions for many years should be rotated with other crops, but it cannot be rotated with the garlic and leeks of Liliaceae.

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