Quinomycin-A preparation and preparation method and application thereof

Abstract

The invention discloses quinomycin-A preparation and a preparation method and application thereof. The quinomycin-A preparation comprises, by weight percent, 1-30% of quinomycin-A, 10-12% of emulsifier, and 60-89% of organic solvent. The even and stable quinomycin-A preparation is prepared by using quinomycin-A as raw material, emulsifying the quinomycin-A in a reactor by the emulsifier and mixing with the organic solvent. The preparation method is simple and low in preparation cost. After spraying, the quinomycin-A preparation is distributed on the surface of a crop in a particulate manner and accordingly is more beneficial to directly inhibiting and killing pathogenic bacteria, and drug effect is improved. The quinomycin-A preparation is efficient and low-toxicity and is pollution-free biopesticide. The quinomycin-A preparation controls disease damage mainly by breaking cell membranes of the pathogenic bacteria and inhibiting formation of DNA (deoxyribonucleic acid) double helixes. The quinomycin-A preparation is effective in controlling phytophthora caused diseases such as Phytophthora melonis Katsura, pepper phytophthora blight and pineapple heart-rot disease, less than conventional drugs in consumption, and can overcome drug resistance of phytophthora to conventional pesticides.

Description

Technical field [0001] The invention belongs to the technical field of plant protection and biological pesticides, and particularly relates to a quinomycin A preparation and a preparation method and application thereof. Background technique [0002] In recent years, the planting area of ​​economic crops in my country has been expanding, and continuous cropping has made soil-borne diseases on the rise year by year. Among them, plant diseases caused by oomycetes are difficult to control. In particular, Phytophthora has a short incubation period and many re-infections. Frequent outbreaks cause serious losses. Phytophthora is a general term for Pytophthra de Bary fungi, which belongs to the flagella subphylum, Oomycetes, Peronospora, and Pythium. Phytophthora mostly live in the soil, with short incubation period, fast spread, strong infectivity, and great damage to plants. Phytophthora invades host plants to produce a large number of sporangia and release zoospores in a short period...

AI Technical Summary

Problems solved by technology

Before the 1980s, non-systemic copper preparations and dithiocarbamate protective fungicides were mostly used to prevent and control Phytophthora diseases. The commonly used ones are copper sulfate, copper hydroxide, cuprous chloride, zinc zinc, and Manganese, mancozeb and propineb, etc., their common feature is that it is not easy to produce drug resistance to multi-site inhibition of bacteria, but the effect is long, and the effect after use is not ideal; Systemic fungicides such as toxin mold and metalaxyl have better effect

These drugs are expensive and have been used for many years, and some areas have developed drug resistance. Most of the drug resistance traits can be continuously and stably inherited in the process of asexual offspring reproduction

At present, the efficacy of this type of medicament has dropped significantly, and the control effect in the field is very poor, and the epidemic of the disease can no longer be controlled, and the prevention and control of the disease is in a difficult situation.

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