A method of mixed sowing with clubroot resistant rapeseed varieties to reduce the incidence of susceptible varieties

Abstract

The invention belongs to the field of agricultural technology, and in particular relates to a method for mixed sowing with clubroot resistant rapeseed varieties to reduce the incidence rate of susceptible varieties. The method for reducing the incidence rate of susceptible varieties by mixing with clubroot resistant rapeseed varieties comprises the following steps: combining at least one susceptible rapeseed variety susceptible to at least one clubroot pathogenic race with at least one resistant rapeseed variety Mixed sowing of at least one disease-resistant rapeseed variety of the causative physiological race of clubroot. The inventors found that mixing the rapeseed clubroot disease-resistant and susceptible varieties in proportion can stabilize the superior and inferior status of each physiological race in the soil, ensure long-lasting resistance of the varieties, and utilize the hindering effect of the disease-resistant varieties on the pathogen , significantly reducing the incidence of disease-susceptible varieties, ensuring the planting density of direct seeding rapeseed and stabilizing yield.

Description

technical field [0001] The invention belongs to the field of agricultural technology, and in particular relates to a method for mixed sowing with clubroot resistant rapeseed varieties to reduce the incidence rate of susceptible varieties. Background technique [0002] Clubroot is an obligate parasitic cruciferous soil-borne disease, which can lead to crop yield reduction or even failure once it occurs. The disease was first discovered on the west coast of the Mediterranean Sea and southern Europe, and now clubroot of cruciferous crops occurs in more than 60 countries around the world, reducing yield by 10% to 15% every year. Its dormant spores can survive in the soil for more than 15 years. Once the soil has clubroot, cruciferous crops cannot be cultivated. Rapeseed is an important oil crop in my country, and the perennial planting area is stable at about 100 million mu. However, the area damaged by clubroot in my country is also expanding year by year. According to statis...

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Problems solved by technology

However, clubroot resistance is controlled by a small number of genes, and the resistance genes are specific to physiological races. If the same disease-resistant variety is planted for a long time, other physiological races mixed in the soil may become dominant races, resulting in its resistance. lost

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