Weeding macro granule for paddy field and preparation method thereof

Abstract

The invention provides a weeding macro granule for a paddy field. The weeding macro granule comprises the following raw materials in parts by weight: 1-30 parts of pretilachlor, 1-25 parts of adsorbents, 0.5-5 parts of pyrazosulfuron, 0.5-25 parts of surfactants, 1-30 parts of oily substances, 10-80 parts of a solid core material, 10-20 parts of additives and 10-20 parts of fillers. The weeding macro granule for the paddy field disclosed by the invention utilizes a floating material, floating glass beads, and thus the granules can float on water, and can automatically diffuse under the action of wind and assistants of the granules; a high-performance dispersing agent is introduced into the formula, and thus the effective components of the granule can diffuse to the overall field within a short period of time. Thus, the pesticide effect is lasting, and labor and time are saved.

Description

technical field [0001] The invention belongs to the technical field of pesticides, and in particular relates to a paddy field herbicide large granule and a preparation method thereof. Background technique [0002] As the society pays more and more attention to the safety of pesticide application and environmental protection, pesticide formulations that pollute the environment such as emulsifiable concentrates are gradually eliminated, and new formulations of pesticides with high efficiency, low toxicity, and environmental protection such as granules and water-dispersible granules are gradually promoted. From the late 1980s, Japan began to conduct research on the labor-saving weeding technology for paddy fields, and successfully launched the large-grain weeding agent (JUMBO agent) for paddy fields in the 1990s. Domestically, the Plant Protection Institute of the Chinese Academy of Agricultural Sciences has developed a 5% insecticidal large granule, which is easy to use, saves...

AI Technical Summary

Problems solved by technology

However, paddy field granules have high requirements on the dispersion performance of the preparation. Early paddy field granules did not use buoyant materials, and their specific gravity was heavier than water. The diffusion performance of the agent after application was poor. The pesticide concentration in the area is often higher than other areas of the paddy field, so it may cause phytotoxicity to the crops

Effervescent tablet herbicides can also float and spread on the water surface, but effervescent tablets require high and complex production processes, and the production cost is high. In addition, effervescent tablets are easy to absorb moisture and have very strict packaging requirements

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