Isaria fumosorosea wettable powder, and preparation method thereof

Abstract

The invention discloses an isaria fumosorosea wettable powder. The isaria fumosorosea wettable powder is composed of a combination of isaria fumosorosea spore powder, sodium lignosulfonate (CMN), anddispersing agent NNO, a combination of isooctyl alcohol polyoxyethylene ether polyoxypropylene ether (CA-60) and sodium alpha-olefin sulfonate, a combination of polyvinylpyrrolidone-K30, aerosol, andacid yellow 25 or chrysophenine G, skimmed milk powder or chitosan oligosaccharide, super absorbent polymer SAP, and diatomite. The advantages are that: low cost and high resistance fermenting, drying, and spore powder preparation technology is adopted, so that the optimum preparation surfactant is selected based on biocompatibility and wetability, dispersibility and suspensibility tests. The preparation method is capable of improving preparation invasion and germination capability at low humidity conditions, improving the performance of the isaria fumosorosea wettable powder effectively, prolonging preparation self life, and improving preparation field drug effect and effect lasting performance.

Description

technical field [0001] The invention belongs to the field of biopesticide preparations, and in particular relates to a wettable powder with conidia of the entomophyte fungus Isyrrhizae as active substance and a preparation method thereof, which is mainly used for preventing and treating piercing-sucking mouthpart pests in greenhouses (such as Bemisia tabaci, etc.). Background technique [0002] Compared with traditional chemical pesticide control, biological control is safe for humans, other organisms and the environment, and pests are not easy to develop resistance to pesticides, and have a long-lasting effect of controlling pests. Biological control includes the use of natural enemy insects, entomopathogenic microorganisms, and insect pheromones. Entomopathogenic fungi, as a class of entomopathogenic microorganisms, play a very important role in the biological control of pests, among which the application effect of fungal pesticide technology is the most significant. Fun...

AI Technical Summary

Problems solved by technology

As organisms, fungi are sensitive to external environments such as temperature, humidity, light, etc., so the processing of fungal insecticide formulations is more complicated than chemical insecticides

At present, fungal insecticides generally have defects such as slow drug effect, unstable effect, short product shelf life, and poor drug effect due to many field environmental constraints.

Common problems in the production and use of commercially available fungal insecticidal wettable powders are: (1) the process of entomogenic fungus cultivation and spore drying and collection is complicated and the production cost is high; (2) the particle size of the suspension formed by mixing the preparation with water is relatively large Or poor suspension performance is easy to block the nozzle; (3) the general lack of suitable growth-promoting additives and micro-ecological additives in the preparations causes the infestation ability of insect-growing fungi to be greatly affected by the ambient humidity, which restricts the performance of the drug; ( 4) Entomogenous fungal spores are very sensitive to ultraviolet radiation, and the anti-ultraviolet ability of the preparation after application is insufficient, which affects the field persistence of the agent

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