Freeze-dried powdered, dried and suspended fungicide and preparation method thereof

Abstract

The present invention provides a freeze-dried powdered, dried and suspended fungicide and a preparation method thereof. The fungicide consists of the following raw materials in percentages by weight: 15-30% of pythium oligandrum oospore powder and fermented liquid freeze-dried powder, 9-18% of wetting and dispersing agent, 0.2-0.5% of ultraviolet protective agent, 3-12% disintegrant, 3.0-10% of binder and 29.5-69.8% of carrier. All the raw materials are mixed, mist sprayed and granulated to obtain the finished product. The fungicide makes up the drawbacks of using pythium oligandrum oospore powder and pythium oligandrum fermented liquid freeze-dried powder individually, this dosage form improves the germination rate and suspension rate of oospores, and the fungicide is fast in wetting and disintegrating speed, excellent in dispersion and thermal storage stability, and provides a new material for plant disease prevention and cure.

Description

technical field [0001] The invention relates to the technical field of environmental protection, in particular to a freeze-dried powder dry suspension fungicide and a preparation method thereof. Background technique [0002] Dry suspension concentrate is a new pesticide formulation and new formulation processing technology that was developed internationally in the 1980s. Dry suspension concentrate is considered to have both the advantages of granules and the ideal pesticide formulation with high dispersion performance of suspension concentrate, and has become a hot spot in the development of new formulations. It has a granular dosage form that rapidly disintegrates into water and disperses into a high-suspension solid-liquid dispersion system. It does not contain organic solvents, has a high suspension rate, no dust, and is easy to use. [0003] Pythium Oligandrum (Pythium Oligandrum), belonging to the flagellate subphylum, is a highly aggressive parasitic fungus that exist...

AI Technical Summary

Problems solved by technology

[0006] Because Pythium oligandrum forms oospores, artificial sporulation is difficult, which limits its application range

However, the germination and hyphal growth of oospores are closely related to the external environment, and their growth-promoting and disease-preventing effects are also affected by environmental factors, and their stability is poor.

In view of the above disadvantages and the problem of poor quick-acting of microbial pesticides, it is of great practical value to develop a dry suspension fungicide

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