Comprehensive Control of Soybean "Fire Dragon Seedling"

Soybean root nematode disease, also known as Huolong seedling, root nematode disease is a whole plant disease, caused by nematode invasion of soybean roots caused by bacterial infection. The growth of the injured plant was slow, the stems and leaves were short and yellow, the flowering was delayed, the pods were few and small, the seeds were not full, and in serious cases, the whole plant withered.

The spread of soybean root nematode disease is rapid, and the pathogenic nematode can survive for a long time in the soil, but it is difficult to completely eliminate once the disease occurs, so comprehensive control measures must be taken.

1. Selective sowing of disease-resistant varieties; 2. To control the source of infection, the roots of the land should be cleared and burned, and the used agricultural tools should be cleared clean and then used in a disease-free place. The implementation of 3-4 years of rotation, the disease is more important to implement more than 5 years rotation; 3. To increase the application of organic fertilizer, more organic fertilizers such as horse dung and green manure should be applied to promote the growth of soybean and enhance the ability of disease resistance. The results showed that the incidence rate could be significantly reduced with the application of 1500kg organic fertilizer per mu. Chemical control application of 5% methyl-mixed phosphorus granules 4ml 5kg or 3% furan granules 4ml 5kg, sowing along with the application of ditches, the prevention effect is better. After the onset of the disease, 50 kg of the above-mentioned medicament can also be used to irrigate the roots; at the same time, liquid fertilizer or treasure can be sprayed on the leaves. The liquid fertilizer is sprayed at 500x for the first time, the second time at intervals of 5ml / 7d, and 1000 times at intervals of 7 days. Spraying Shibao 5ml / mu to 50 kg of water, spraying twice can promote the growth of diseased plants.