Biocontrol strain and agent capable of preventing and controlling plasmopara viticola and phytophthora capsici and application of biocontrol strain and agent

Abstract

The invention discloses a biocontrol strain and agent capable of preventing and controlling plasmopara viticola and phytophthora capsici and an application of the biocontrol strain and agent. The biocontrol strain is characterized by being a streptomyces atratus py-1 strain in surface soil of a grapery and is collected with the number of China General Microbiological Culture Collection Center (CGMCC) No:7826 in CGMCC; and a secondary metabolite of streptomyces atratus py-1 is used as an active component of the biocontrol strain. The biocontrol agent is prepared through the steps of inoculating the streptomyces atratus py-1 into 200ml of psa culture solution in a 500ml triangular flask to culture for 5 days; centrifuging a fermentation solution for 30 minutes; filtering a supernatant solution by using a filter membrane to obtain a stock solution; diluting the stock solution, then, spraying the diluted stock solution on grapes, and irrigating the diluted stock solution into the roots of hot peppers. The biocontrol agent has a certain effect on inhibiting egg plant stem blight, egg plant root rot, tomato spotted wilt virus, tomato late blight, cucumber anthracnose, maize ear rot, sorghum curvularia lunata and wheat root rot.

Description

technical field [0001] The invention relates to a biocontrol strain, a preparation and its application, in particular to a biocontrol strain capable of preventing and treating grape downy mildew and capsicum blight, a preparation and its application, belonging to the technology of biocontrol preparations made from beneficial biocontrol strains field. Background technique [0002] Grape downy mildew is caused by grape downy mildew ( Plasmopara viticola (Berk. and Curt.) Berl. and de Toni) caused by fungal disease, is a worldwide ancient disease, all over the grape producing areas at home and abroad, is one of the main grape leaf diseases. The disease was first discovered on wild grapes in eastern North America. In 1870, Europe introduced American phylloxera-resistant rootstocks, and grape downy mildew entered Europe. A few years later, downy mildew first occurred on a large scale in southern France, and then spread throughout Europe, becoming the primary disease of local gr...

AI Technical Summary

Problems solved by technology

[0009] At present, the control of grape downy mildew and pepper blight only relies on chemical pesticides, which not only cause serious pollution to fruits and the environment, but also threaten food safety.

The use of biocontrol fungicides to control grape downy mildew and pepper blight has few research reports, and there is no registered product

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