Seed coating agent for preventing rice sheath blight diseases, preparing method and application method thereof

Abstract

The invention discloses a seed coating agent for preventing rice sheath blight diseases, a preparing method and an application method thereof, which belong to the technical field of rice sheath blight disease prevention and control. The seed coating agent is prepared through the following steps: mixing thifluzamide technical material with an emulsifying agent and a cosolvent, and stirring the obtained mixture so as to form a uniform oil phase; mixing water, an antifreezing agent, a film-forming agent and a thickening agent and the like so as to form a uniform water phase; and slowly pouring the oil phase into the water phase, and carrying out high-speed shear emulsification on the obtained mixture so as to obtain milky liquid dispersed well. According to the seed coating agent, thifluzamide is adopted for preparing the seed coating agent for preventing rice sheath blight diseases, the process equipment is simple, the investment is small and the application is convenient; the seed coating agent is used for preventing and controlling rice sheath blight diseases, and just required to be used one time in the whole growing season of rice, and therefore, an effect of time saving and labor saving is achieved, the residual effect period is long, and the prevention and control effect reaches over 80%.

Description

technical field [0001] The invention relates to a production method and usage of a seed coating agent, in particular to a method for preventing and treating rice sheath blight by using thifuramide and its usage, and belongs to the technical field of rice sheath blight prevention and control. Background technique [0002] Rice sheath blight (rice sheath blight) is one of the common diseases of rice, which occurs widely in all rice areas in my country, mainly causing a significant decrease in seed setting rate and thousand-grain weight, and even plant lodging and death. With the change of farming system, the popularization of dwarf stem and multi-spike varieties, and the increase of planting density and fertilization level, the occurrence area of ​​rice sheath blight in my country has been expanding, and the occurrence degree has been increasing. It has become one of the important factors restricting the high yield of rice. [0003] As rice enters different growth stages, the...

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Problems solved by technology

[0003] As rice enters different growth stages, the development of rice sheath blight has two stages: horizontal expansion and vertical expansion. In order to effectively control rice sheath blight, it is necessary to apply pesticides multiple times during the rice growing season, thus causing heavy control for farmers. burden, and further tied farmers to the land, unable to go out to work, restricting the increase of farmers' income