Streptomyces griseochromogenes YN-6 and application thereof to club root control

Abstract

The invention provides a Streptomyces griseochromogenes YN-6 separated from germ-carrying soil of cruciferae crops infected with club root, and the CCTCC No is M2013187. The strain YN-6 has good control effect on the club root of the cruciferae crops through verification of club root germ resting spore germination inhabitation and greenhouse pot experiments. The strain is high in adaptability and colonization capacity under field natural conditions, not prone to antagonistic reaction with complicated microorganism species in field soil, the disease control effect is stable, defects of chemical control, disease-resistant variety and agricultural control methods are effectively overcome, and the strain is an ideal anti-biological inoculant applicable to field club root control.

Description

technical field [0001] The invention relates to the field of biological control, in particular to a strain of Streptomyces griseochromogenes YN-6 and its application in preventing and treating clubroot. Background technique [0002] Cruciferous crop clubroot is a worldwide soil-borne plant disease caused by Plasmodiophora brassicae infection. Plasmodium brassicae is an obligate parasite. It overwinters with its dormant spores in the soil with diseased residues and undecomposed manure. It has a strong survival ability and can generally survive for at least 8 years. It can survive for more than 15 years under suitable conditions. . At present, the main control measures for clubroot of cruciferous crops include chemical control, utilization of disease-resistant varieties, agricultural control and biological control. [0003] Chemical control is a relatively common method of prevention and control. Carbendazim, pentachloronitrobenzene, chlorothalonil, fluazide (fluazinam), and...

AI Technical Summary

Problems solved by technology

However, it takes a long time and a long cycle to cultivate disease-resistant varieties, and clubroot bacteria have physiological race differentiation, and the resistant varieties will become susceptible after several years of application. Therefore, it is very difficult to completely control clubroot through disease-resistant varieties.

[0005] Agricultural control methods such as soaking seeds in warm soup, adding slaked lime or plant ash, etc. These treatment methods also have certain limitations. For example, applying slaked lime changes the acidity and alkalinity of the soil, but long-term use will destroy the soil structure, so it is not suitable for long-term use.

Images