Crop leaf covering agent and preparation method thereof

Abstract

The invention discloses a crop leaf covering agent comprising the following raw material components by weight: plant straws, brown coal, clay and carbon dust, and the raw materials quantified according to a formula are added into a stirring machine for uniform stirring after being smashed and are then packaged to form a finished product. The leaf covering agent is sprayed in a crop susceptible period to form a layer of uniform protective film on the surface of a leaf, germ spores in the atmosphere cannot directly fall on the surface of the leaf, but fall on the covering agent, and pathogenic bacteria are not in direct contact with the surface of the leaf, and physical blockage is formed, so that the leaf cannot be infected by the pathogenic bacteria; the pathogenic bacteria survive for 1-24h under an in-vitro condition and continuously die as time goes by, the susceptible period of general crops to certain aeroborne diseases ranges from 7 days to 10 days, and therefore, one aeroborne disease of a crop can be effectively avoided by only controlling the covering time of the preparation disclosed by the invention at 15 days; and the crop leaf covering agent is low in cost, turns wastematerials into things of value, and is easy to process, pollution-free and high in prevention effect.

Description

technical field [0001] The invention relates to the technical field of crop fungus and insect control, in particular to a crop leaf covering agent and a preparation method thereof. Background technique [0002] The preparations currently used to spray crop leaves are fertilizers or chemical pesticides. Fertilizers are used to supplement crop nutrition, and chemical pesticides are used to sterilize and eliminate insects on leaves. In current production, the prevention and control of crop airborne diseases is still based on spraying chemical pesticides. Bactericides are the only way. On the one hand, the use of fungicides pollutes the ecological environment, on the other hand, there are pesticide residues on the crops, and on the other hand, the duration of the fungicide is short. It needs to be sprayed several times during the susceptibility period of crop leaf diseases to achieve the effect of sterilization and disease prevention, which is a waste of manpower. , material an...

AI Technical Summary

Problems solved by technology

On the one hand, the use of fungicides pollutes the ecological environment, on the other hand, there are pesticide residues on the crops, and on the other hand, the duration of the fungicide is short. It needs to be sprayed several times during the susceptibility period of crop leaf diseases to achieve the effect of sterilization and disease prevention, which is a waste of manpower. , material and financial resources, but also pollute the environment