The latest control methods of rape root swelling disease

Rape root swelling disease is a fungal disease, which mainly harms the roots of rape, often leading to a serious decline in the yield and quality of rape, so how to do rape root swelling disease? Let's take a look at the prevention and treatment of rape root swelling disease with the editor.

1. Occurrence of symptoms

Root swelling disease mainly occurs in the root, the disease is the root will be fusiform or irregular deformed "tumor", mainly occurs on the main root, the lateral root is small, the initial tumor surface is smooth, white, and then gradually turn brown to avoid roughness. There will be cracks over a long period of time. In the early stage of the disease, because of the high temperature at noon, the transpiration of rape is larger, which will give off a lot of water, while the root system is destroyed because of tumor, so the ability of absorbing water and fertilizer is reduced. Because in the case of lack of water, the aboveground plants will also wither, and as the disease worsens, the diseased plants will wither or even die.

2. The cause

First of all, the pathogen overwinters and summers in the soil, and the pathogen has strong vitality and can survive in the soil for more than 10 years, and long-term continuous cropping in the affected area provides favorable conditions for the reproduction of pathogens. It is because of the long-term application of chemical fertilizers, chemical pesticides, and no improvement of the soil, resulting in serious soil acidification. The third is climate change. In recent years, the temperature of rape is on the high side after transplanting, and the soil moisture is high, especially some fields are low-lying and the disease is serious after the water is changed to dry land.

3. Prevention and control methods

Comprehensive measures should be taken to control rape root swelling disease. First of all, rational crop rotation and non-cruciferous crop rotation should be carried out for more than 5 years. Select varieties with strong disease resistance when planting, advocate raising seedlings with nutrition bowl when raising seedlings, disinfect the seedling bed before sowing, and cultivate virus-free seedlings. Soak the root with lime water or thiram 1000 times solution before transplanting or use it as root water. When applying fertilizer, try to avoid a large amount of chemical fertilizer to avoid soil acidification, the diseased field can use lime to change kidney beans, make the soil slightly alkaline and reduce the disease.

The above is the introduction of rape root swelling disease prevention and treatment methods, hope to help you, want to know more related knowledge, please pay attention to us.