A Strain of Dewy Paint Spot Fungus and Its Application

Abstract

The invention relates to the technical field of biological weeding, particularly to Myrothecium roridum BC-1 with the preservation number of CGMCC No.11393. The Myrothecium roridum BC-1 is separated from blades of naturally diseased Echinochloa crusgalli (L.) Beauv. and has rapid and efficient pathogenicity for the Echinochloa crusgalli (L.) Beauv.; indoor experiments prove that conidia of the strain BC-1 are sprayed onto the blades of the Echinochloa crusgalli (L.) Beauv., scabs can appear after two days, contiguous scabs can appear on the blades of partial Echinochloa crusgalli (L.) Beauv. after seven days, the blades are withered, and the fresh weight reduction of the Echinochloa crusgalli (L.) Beauv. can be up to 93.7% after 21 days. The fungus strain, namely, the Myrothecium roridum BC-1, is safe to crops such as corn, wheat, rice and the like, has the better control effect on the Echinochloa crusgalli (L.) Beauv., has a certain biological control effect on weeds such as common crabgrass, Setaria viridis and the like, has higher potential for development of a commercial bio-herbicide, and has the very significant economic and social benefits.

Description

technical field [0001] The invention relates to the technical field of microbial control, in particular to a strain of varnish spot fungus, and also relates to the application of the spot varnish fungus. Background technique [0002] Farmland weeds have well-developed root systems and strong ability to absorb water and nutrients. They compete with field crops for conditions such as water, nutrients, light, and space, seriously endangering the yield safety of farmland crops. There are more than 1,400 species of weeds in my country, among which more than 60 species have important impact on the safety of crops such as grain and vegetables in our country. According to statistics, my country's annual grain loss caused by weed damage reaches 200 million tons, accounting for about 11% of my country's total agricultural output. However, on the other hand, with the development and use of high-efficiency chemical herbicides in recent years, although the harm of weeds to agricultural ...

AI Technical Summary

Problems solved by technology

At present, the control of weeds in farmland is mainly through the following three methods: first, manual or mechanical control, this method is time-consuming, laborious, costly and unsatisfactory, and the current application range is relatively small; second, chemical control , the method is simple, low cost, quick effect, and is currently the most important method to solve the harm of weeds

However, the long-term use of chemical herbicides not only causes environmental pollution, but also leads to the emergence of highly resistant weeds, which makes the use of chemical agents fall into a vicious cycle of gradually increasing the use of simple doses

Thirdly, biological control. Weed biological control strains are mostly collected from nature, with low toxicity and long-term control characteristics that can be passed down for many times. It is an effective means to reduce the use of chemicals, but weed biological control started late. And the effect is slow and the cost is high

At the same time, there are few bacteria resources that can be used for weed biological control, and most of the research is concentrated in the laboratory, and there are few real large-scale industrial applications.

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