Chaetomium globosum LJ-S2L1 strain and application thereof

Abstract

The invention discloses a chaetomium globosum LJ-S2L1 strain and an application thereof. The preservation number of the strain is CCTCCM 2016649. The strain is simple in culture requirement, high in yield and good in antibacterial effect, growth conditions are easily controlled, and capsicum fusarium wilt pathogenic bacterium hyphae can excessively shrink, bend and partially expand through the strain. Toxicity measurement results show that the ratio of fermentation liquor of the strainS2L1 for inhibiting capsicum fusarium wilt pathogenic bacteria can reach 72.10% in 1000 micrograms / mL, median inhibiting concentration is 300.63 micro-liters / mL, and pot experiment control effect can reach 71.8% and is equal to that of 500 times dilution of 80% of carbendazim. The strain has wide application prospect in the prevention aspect of the capsicum fusarium wilt, both the fermentation liquor and sterile fermentation filtering liquid of the strain have high inhibiting effect, and the strain can serve as biological agents for the capsicum fusarium wilt.

Description

technical field [0001] The invention relates to the field of biotechnology, in particular to a chaetomium globosa LJ-S2L1 strain and application thereof. Background technique [0002] Fusarium wilt is a serious soil-borne disease in pepper production in recent years. The pathogenic bacteria Fusarium oxysporum not only has a wide range of hosts, but also can survive in the soil for a long time. With the expansion of the planting area of ​​pepper and the improvement of the multiple cropping index, Fusarium wilt of pepper accumulates and spreads in the field year by year, resulting in the widespread occurrence of the disease, and in severe cases, the yield can be reduced by 70% to 80%. Not only that, the occurrence of fusarium wilt weakens the immunity of the pepper plant itself after the disease, making it easier for other soil-borne pathogens to invade, and even causes the whole field of pepper to wither and die when the disease is severe. [0003] The current control method...

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Problems solved by technology

However, there are few kinds of antagonistic chaetomes studied at present. Although two strains of Chaetomium globosa have been isolated and used to prevent and treat fungal diseases of ginseng and apples, Chinese patents: CN104694397A, CN104877919A, none of them involve isolation from field application. Among the farmyard manures, it has not been reported that it has a control effect on pepper wilt and other soil-borne diseases that harm the roots of peppers.

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