Yellow bacillus and its snail killing agent

Abstract

The invention relates to a Xanthobacter and its snail killer. A snail bacterium, namely Xanthobacter autotrophicus is a Xanthobacter autotrophicus II whose collection unit. It uses beef peptone agar plate or slope culture medium to separate bacterial strains, obtains snail-killing Xanthobacter autotrophicus solution (a hundred million grades / ml) by bottle-shaking fermentation process; and the application of Xanthobacter autotrophicus as a snail killer is that: making ultrasonic processing on the Xanthobacter autotrophicus solution and plant material forming agent, then mixing them to prepare a novel biological snail killer, which has the characters: (1) quickly killing the snail, and effectively preventing the snails from climbing up to flee; (2) harmless to non-target living things and fish, fast to naturally degrade and no pollution; (3) no toxic and side effect, and time of maintaining snail-killing pesticide effect 15 days long; (4) convenient to store, transport and use; etc.

Description

technical field [0001] The invention relates to a bacterium with molluscicidal effect and its cultivation method, its use as a molluscicide and the molluscicide prepared therefrom, in particular to a snail-killing snail autotrophic yellow bacillus and its molluscicide. Background technique [0002] Oncomelania is the intermediate host of schistosomiasis and an important medium for infecting schistosomiasis. Therefore, killing snails is one of the effective ways to control and block the spread of schistosomiasis; most of the molluscicides used in countries around the world are chemical molluscicides, such as Sodium pentachlorophenate used in the early days, bromoacetamide, nicotinamide and niclosamide, etc., which have been popularized and applied in recent years, these molluscicides have problems such as weak selectivity, poor persistence, and easy to cause environmental pollution to varying degrees. In order to avoid the environmental pollution of chemically synthesized mol...

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Problems solved by technology

[0006] The molluscicidal effect of an effective molluscicide is closely related to its application method. Generally speaking, the molluscicide must be in contact with the microorganisms to fully exert its effectiveness, which greatly limits the application methods of microbial molluscicides. And because the strains of microorganisms are different, their biological characteristics are also different. At the same time, due to the influence of various physical and chemical factors, such as temperature, light, soil water content, dosage form of molluscicide, pH value, etc., microbial molluscicide has not yet been developed. For real practical applications, most of the tests are conducted in laboratories, and a small number of strains or preparations for on-site tests use mostly coarse powder, and the amount used in on-site spraying experiments is relatively large, but there are many components in the culture medium; Most of the wild strains used are directly isolated from the field without selection

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