Coating type slow-released granular pesticide

Abstract

The invention provides a mixed agrochemical granular agent capable of performing a controlled release of >=2 different kinds of agrochemical active ingredients having especially different solubility in water from each other and suitable for the treating method of seedling box of the rice at an individual eluting rate, and a method for producing the same. This controlled releasing mixed agrochemical granular agent is obtained by preparing a granulated material consisting of >=1 kind of agrochemical active ingredient having a high water solubility, an inorganic diluting carrier and a first thermoplastic material hardly soluble in water, setting the granulated material as an inner core and covering the surface of the core with a mixture of >=1 kind of agrochemical active ingredient different from the agrochemical active ingredients contained in the inner core and having a low water solubility, an inorganic diluting carrier and a second thermoplastic material hardly soluble in water to make an outer surface.

Description

technical field [0001] The present invention relates to a slow-release pesticide granule containing two or more different types of pesticide active ingredients, used for eluting each pesticide active ingredient into an aqueous medium, and a manufacturing method thereof. The invention relates to a slow-release pesticide granule for a rice seedling box and a manufacturing method thereof. As a slow-release pesticide granule for nursery boxes, it is applied in the nursery boxes used for rice seedling cultivation, and when transplanting rice seedlings thereafter, it is contained in The active pesticides in the granules are continuously and slowly released at their respective dissolution rates. Background technique [0002] In recent years, large-scale production and mechanization of paddy fields have been rapidly promoted in order to achieve low cost of rice cultivation. Correspondingly, technological innovations in the application methods of pesticides have also emerged in an ...

AI Technical Summary

Problems solved by technology

However, in the slow-release method using a hydrophobic substance such as a wax, for two or more types of pesticide active ingredients, especially two kinds of pesticide active ingredients that have greatly different solubility in water, when the same wax is used to slow down When releasing, if the wax with the best release rate for one pesticide active ingredient is selected, the release rate for another pesticide active ingredient is either extremely fast, or on the contrary extremely slow, so that both have appropriate Slower release rates are difficult

That is, as far as the inventors of the present invention know, as an agricultural chemical that contains two or more types of agricultural chemical active ingredients having a large difference in water solubility in one granule preparation, and simultaneously releases these two or more agricultural chemical active ingredients Preparation, suitable dosage form is not yet known

In addition, there is no report on the example of using two or more types of waxes for the sustained release of each active ingredient of the pesticide.

[0009] As mentioned above, in the technical scheme of pesticide formulations containing two or more active ingredients of pesticides, at least one of the active ingredients of pesticides is slow-released, at least two active ingredients of pesticides with greatly different water solubility In the formulation, if both can be slow-released at the same time so that they can be released at different dissolution rates to make, for example, pesticide granules suitable for use in the rice seedling box treatment method, it has not yet been seen to meet this requirement. new formulations of