Isaria fumosorosea water dispersible granule and preparation method thereof

Abstract

The invention discloses an Isaria fumosorosea water dispersible granule. The water dispersible granule is prepared from Isaria fumosorosea spore powder, sodium lignosulfonate (CMN), sodium dinaphthylmethanedisulfonate (NNO), isooctyl alcohol polyoxyethylene ether polyoxypropylene ether (CA-60), sodium alpha-olefin sulfonate, corn starch, fumed silica, ammonium sulfate, polyvinylpyrrolidone K30, pre-gelatinized starch, a combination of fumed silica and acid yellow 25 or chrysophenine 12, skim milk powder or chitosan oligosaccharide, water-absorbent resin SAP and diatomaceous earth. Low-cost andhigh-stress resistance fermentation, drying and coarse spore powder preparation processes are adopted; a surfactant with best biocompatibility, wettability, dispersibility, disintegration property and adhesion property is screened; and the invasion and germination ability of the above preparation in low-humidity fields is improved. The production cost is reduced, the performances of the preparation are effectively improved, the shelf life is especially prolonged, and the field drug effect is especially improved.

Description

Technical field [0001] The invention belongs to the field of biological fungal biological pesticide preparations, and specifically relates to a water-dispersible granule using conidia of the entomogenous fungus Rhododendron sphaerophyllum as an active substance and a preparation method thereof, and is mainly used for the prevention and treatment of greenhouse piercing and sucking Mouth pests (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 less likely to develop resistance to pesticides, and have a lasting effect on pest control. Biological control includes the use of natural enemies, insect pathogenic microorganisms, insect pheromones, etc. Entomopathogenic fungi, as a class of insect pathogenic microorganisms, play a very important role in the biological control of pests. Among them, the application effect of fungal pestic...

AI Technical Summary

Problems solved by technology

[0005] Compared with other formulations or chemical pesticide water-dispersible granules, the main technical problems faced by fungal insecticidal water-dispersible granules can be summarized as follows: (1) the production cost of water-dispersible granules is higher than that of other formulations; (2) the formulation collapses in water Slow or insufficient disintegration, the dispersion and suspension performance can not meet the requirements; (3) The particle strength of the preparation is not suitable, too much strength is not conducive to disintegration, and the strength is too small and easy to break during storage and transportation; (4) The preparation generally lacks suitable growth-promoting agents Auxiliaries and microecological auxiliaries cause the infection ability of entomogenic fungi to be greatly affected by environmental humidity, which affects the performance of the drug; (5) entomogenic fungal spores are very sensitive to ultraviolet radiation, and the anti-ultraviolet ability of the preparation after application is insufficient. Affects the field persistence of pesticides

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