Microbial herbicide and preparation method thereof

Abstract

The invention relates to a microbial herbicide and a preparation method thereof, belonging to the technical field of pesticide production. The microbial herbicide is prepared from the following ingredients in parts by weight: 10-35 parts of spore suspension mother liquor of Alternaria augustiovoidea strains AAEC05-3, 15-25 parts of spore suspension mother liquor of A. amaranthi-3 and 5-12 parts of Tween-80. The preparation method comprises the steps of mixing the two kinds of spore suspension mother liquor according to a certain ratio, then, adding Tween at the spray volume of 100-150mL / m<2>, and carrying out moisture retention for 40-60 hours, thereby obtaining an aqueous microbial herbicide. The herbicide can effectively inhibit Echinochloa crusgalli and Amaranthus retroflexus, is non-toxic and readily degradable, and is a product with development and application prospects.

Description

technical field [0001] The invention relates to a microbial herbicide formula and a preparation method thereof, belonging to the technical field of pesticide processing. Background technique [0002] Weeds have always been considered as one of the biological disasters that seriously affect agriculture and the environment. Every year around the world, farmland weeding takes about 150-300 billion labor days, but weeds still cause a 10%-25% reduction in production, of which more than 150 million tons of cereal crops have been reduced. After the invention of 2,4-D in 1942, the chemical herbicide industry emerged. Chemical herbicides reversed about 50% of the grain yield loss compared to no weeding. However, the extensive use of chemical herbicides has brought about a series of ecological and environmental problems. Such as herbicide droplet drift, poor selectivity, long half-life in the environment, and toxicity to humans and animals. Especially the emergence of herbicide-re...

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Problems solved by technology

[0005] Patent 201110199619.6 discloses the invention of a herbicide. The rice field herbicide is prepared by mixing nitrophenol, chlorophenol, carbamic acid, and p-phenylenediamine. It belongs to the chemical industry, but this herbicide is easily decomposed into Toxic compounds, high pressure on human body and environment, not easy to degrade

Patent 200880025571.3 discloses the invention of a new type of herbicide, which is composed of pyrandione, thiopyrandione and cyclohexanetrione compounds. The herbicide has poor compatibility with the environment, is not easy to degrade, and is easy to cause pollution to the environment