Pseudomonas cepacia strain QBA-3 having function of inhibiting botrytis cinerea and application thereof

Abstract

The invention discloses a pseudomonas cepacia strain QBA-3 having the function of inhibiting botrytis cinerea and an application thereof. The pseudomonas cepacia strain QBA-3 is obtained through screening, the class name of the QBA-3 is Pseudomonas cepacia, the QBA-3 is preserved in China Center for Type Culture Collection, and the preservation serial number of the QBA-3 is CCTCC M2015402. A botrytis cinerea spore germination experiment, a germinal tube elongation experiment and detached leaf experiment prove that the pseudomonas cepacia strain QBA-3 has the strong inhibiting function on the botrytis cinerea, the pseudomonas cepacia strain QBA-3 can be made into a biocontrol agent preventing the botrytis cinerea and has good market application prospects.

Description

technical field [0001] The invention belongs to the technical field of microbes, and in particular relates to a Pseudomonas cepacia strain QBA-3 capable of inhibiting Botrytis cinerea and its application. Background technique [0002] Botrytis cinerea is an important plant pathogenic fungus widely distributed in the world. There are many kinds of hosts of this fungus, which can infect the stems, leaves, flowers and fruits of 235 kinds of plants, such as tomatoes and cucumbers, and grapes and strawberries. mildew. The disease can occur not only during the growing season of the host plant, but also during the storage of agricultural products, so the damage is serious. Especially in recent years, the large-scale promotion of protected cultivation methods has led to wide sources of infection and rapid spread of the fungus. Botrytis cinerea is becoming more and more serious, and its occurrence and prevalence often cause serious economic losses. According to reports, the occurre...

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Problems solved by technology

[0003] Botrytis cinerea reproduces very fast and produces a large number of conidia, so it is easy to mutate and produce drug resistance. At present, it has been used in agricultural production for benzimazoles, dicarboximides, and carbamates. Resistance to various fungicides such as fungicides, which not only leads to the reduction of control efficiency, but also leads to the continuous increase of the amount of pesticides used

Excessive use of chemical agents not only causes excessive pesticide residues in agricultural products, endangers the health of consumers, but also causes environmental pollution, destroys ecological balance, and affects the sustainable and healthy development of agriculture.

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