Method for producing fungal granular formulation for preventing and treating pest

Abstract

The present invention relates to a method for manufacturing a fungal granule for controlling insects. The invention provides a method for preparing an entomopathogenic fungi sodium alginate granule and a granular formulation prepared through the method. Compared with the prior art, the invention not only preserves the normal advantages of long-time shape keeping of algae colloidal particle and growth recovering of fungus in the particles, but also has other innovations and improvements on other aspects. The algae colloidal particles containing fungus are used for being sprinkled to the farmland or woodland for controlling insects.

Description

technical field [0001] The invention relates to a method for producing a microbial preparation and the microbial preparation prepared by the method. Background technique [0002] The use of entomopathogenic fungi to control agricultural and forestry pests has been widely studied and discussed. So far, a variety of entomopathogenic fungi including Beauveria bassiana coccidioides, Metarhizium anisopliae, Verticillium lecanii, Mortierella Thomsonii, etc. have been used as biopesticides for the control of dozens of pests, including Lepidoptera , Coleoptera, Orthoptera, Homoptera and other subjects of insects and mites. Some have been developed into biopesticide preparations, which have been registered as pesticides in different countries and recommended by FAO, playing an active role in protecting plants, reducing the use of chemical pesticides, and maintaining ecological balance. [0003] It is the key to making entomopathogenic fungi into certain forms of preparations to eff...

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Problems solved by technology

[0004] Existing research and existing problems: According to the characteristics of plant growth and environment and the requirements of fungal application operations, entomopathogenic fungi are generally made into powders, granules, and liquids, which can be used for spreading, spraying, spraying, etc.

[0008] The advantage of the granule prepared by the prior art is that it can keep the granule shape for a long time, and the fungus in the granule can resume growth under suitable conditions simultaneously, but there are still the following deficiencies: 1) the fungal culture used is mycelium, which is liquid It is directly obtained by fermentation, and the biomass per unit volume usually has a large change. The method provided is to mix it with sodium alginate in a certain volume ratio, so it is difficult to accurately calculate the actual bacterial content of the granules prepared each time; 2) the used The fungal culture is mycelium, which is relatively easy to inactivate during the drying and storage of granules; 3) Since no carrier is added, the mixture of bacteria and sodium alginate is directly added dropwise to CaCl 2 In the aqueous solution, the granules formed are usually no longer spherical after drying, but are flat cakes or flakes, which is unfavorable for throwing and spreading; The number of colonies grown is not high, that is, the number of colonies grown per unit of bacteria is low, and the amount and cost of controlling diseases or weeds in the field are relatively high; 5) Sodium alginate can be decomposed and utilized by microorganisms in the environment, according to The granules prepared by the prior art method are easily and quickly polluted by environmental microorganisms after being stored and sprinkled in the field, directly affecting the growth of beneficial fungi in the granules and their infecting effect on target bacteria or weeds

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