Pyraclostrobin and metiram compound water dispersible granules and preparation method thereof

Abstract

The invention relates to the technical field of controlling grape downy mildew and provides pyraclostrobin and metiram compound water dispersible granules and a preparation method thereof. The granules are made from 5 parts of pyraclostrobin, 55 parts of metiram, 6 parts of fatty alcohol sulfate salt, 3 parts of ammonium sulfate, 2 parts of polyethylene glycol, and 29 parts of kaolin. The preparation method includes: mixing the materials, pulverizing a mixture with an ultra-micro flow pulverizer to obtain wettable powder, adding the wettable powder into a fluidized bed drying granulator, allowing granulating in a fluidized bed via aqueous solution of adhesive, allowing drying in a drier, performing screening to obtain a product, performing sampling and analyzing, and metering, packaging and storing a qualified product. When the granules are 60%, the granules compounded by mixing the materials according to the ratio 1:11 has an evident synergistic range; all preparations in mixed use according to the other ratios are beyond the evident synergistic range; the granules are reasonable in design, effective in controlling grape downy mildew and have evident synergistic effect of pyraclostrobin and metiram.

Description

technical field [0001] The invention relates to the technical field of grape downy mildew prevention and control, in particular to a compounded water-dispersible granule of pyraclostrobin and disenlian and a preparation method thereof. Background technique [0002] Downy mildew is a plant disease caused by the Peronospora family in the fungus. It is an obligate parasite and is mainly transmitted through airflow, watering, farming and insects. The spore germination temperature of the fungus is 6-10°C, and the suitable temperature for infection is 15-17°C. It mainly damages peony, peony, rose, chrysanthemum and other flowers. It damages many varieties and infects a wide range, almost all over the country. Downy mildew generally begins to develop from the lower leaves. In the early stage of the disease, light green water-soaked spots are formed, and the edges of the spots are not obvious. Later, they develop into irregular yellow spots. dark gray. [0003] At present, the exi...

AI Technical Summary

Problems solved by technology

For example, the prepared wettable powder is not easy to disperse and suspend in water, or block the nozzle, and cause precipitation in the sprayer, resulting in uneven spraying

[0007] 3) The problem of compounding, through the toxicity test, heat storage stability test and the determination of the mixed co-toxicity coefficient of several specific proportions disclosed by the above-mentioned several fungicides, it was found that no obvious synergistic effect could be achieved

Images