Pesticide micro-granule for spraying foliage in air, and preparation method and application of pesticide micro-granule

Abstract

The invention discloses a pesticide micro-particle agent for air foliar spraying, and a preparation method and application thereof. At least the surface of the pesticide micro-particle agent is provided with a layer emulsified when encountering water or a layer gelatinized when encountering water; the preparation method comprises the following steps: fully shearing and uniformly mixing effective components of the pesticide and a surfactant to form a microemulsion; adding water into the carrier material, shearing and mixing uniformly, and sanding or granulating to form an inner core; finally, mixing the micro-emulsion with the inner core or spraying the micro-emulsion onto the inner core to form a layer emulsified when meeting water or a layer gelatinized when meeting water on the surface of the inner core; or directly mixing, crushing, grinding, spraying, drying and granulating; the particle size of the pesticide microgranule is 0.047-0.5 mm, and the specific gravity is 0.7-1.5 g/cm < 3 >. And an interface which is emulsified or gelled when meeting water is formed on the surface of the particle, so that the particle forms effective adhesion and deposition when reaching the leaf surface of a target crop, and the bounce loss of fog drops is overcome. The problems of mixing compatibility and stability of various pesticide preparations which are mixed and used at present when various diseases and insect pests are prevented and controlled at the same time in agricultural production are effectively solved.

Description

technical field [0001] The present invention relates to the technical field of new pesticide formulations. Specifically, the invention relates to a pesticide granule for aerial foliar spraying, a preparation method and an application thereof. Background technique [0002] The use of pesticides is an important means of effectively preventing and controlling agricultural pests. For a long time, spraying pesticides on water has been widely used. After the mist droplets are sprayed from the nozzle, they are completely exposed to the open ecological environment, and are affected by environmental factors such as wind and sunlight, resulting in evaporation and drift; mist entering the crop canopy When the droplets are deposited on the leaf surface, they will also collide, bounce, coalesce, and roll off, and the pesticide deposition rate is generally less than 50%. [0003] Studies have shown that when the pesticide droplets travel to the target crop canopy, the droplet particle s...

AI Technical Summary

Problems solved by technology

For a long time, spraying pesticides on water has been widely used. After spraying from the nozzle, the fog droplets are completely exposed to the open ecological environment, and are affected by environmental factors such as wind and sun to cause evaporation and drift; fog entering the crop canopy When the droplets are deposited on the surface of the leaves, they will also collide, bounce, coalesce, roll down and lose. The pesticide deposition rate is generally less than 50%.

To this end, people have carried out a large number of experiments, demonstrations and improvements on pesticide formulations and plant protection spraying machines. Technologies such as low-altitude spraying with plant protection drones and special spray auxiliaries for flight prevention have reduced the evaporation and drift of pesticide droplets to a certain extent. , but does not change the essential characteristics of water evaporation and drift of droplets, which has become a technical bottleneck for improving the utilization rate of pesticides

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