Biological magnetic powder seed coating agent for efficiently preventing rape plasmodiophora brassicae and preparation method of biological magnetic powder seed coating agent

Abstract

The invention discloses a biological magnetic powder seed coating agent for efficiently preventing rape plasmodiophora brassicae. The biological magnetic powder seed coating agent is prepared from the following raw materials in parts by weight: 58 to 75 parts of polyvinylpyrrolidone, 10 to 16 parts of potatoes, 1 to 4 parts of brown sugar, 10 to 17 parts of chaetomium globosum bacteria solution, 13 to 19 parts of palygorskite, an appropriate amount of distilled water, 7 to 13 parts of ferroferric oxide, 0.2 to 0.7 part of sarranine, 1 to 3 parts of ethylene glycol, and 2 to 4 parts of potassium sorbate. The chaetomium globosum is cultured in a fermenting manner, the palygorskite is used as a carrier to absorb and fix chaetomium globosum spores in the fermented bacteria solution, so that the later coating effect can be improved; and then the polyvinylpyrrolidone and ferroferric oxide are compounded as a film forming agent, and the coated rapeseeds are treated in a magnetic field, so that the enzyme activation in the seeds is facilitated, the rape root hair can be directly induced to produce resistance, and the infection of the plasmodiophora brassicae bacteria can be prevented.

Description

technical field [0001] The invention relates to a biological pesticide preparation, in particular to a biological magnetic powder seed coating agent for effectively preventing and treating clubroot and a preparation method thereof. Background technique [0002] Rapeseed is the main oil-bearing crop in China. The causative bacterium of rapeseed clubroot is Plasmodium brassicae. It is a global soil-borne plant disease that occurs in many countries. At present, it has become popular in Sichuan, Guizhou and Yunnan, and has expanded to Anhui and Hubei, and has become more serious year by year, seriously threatening the sustainable development of rapeseed. Plasmodium mainly harms the roots of host plants, causing parenchyma cells in the roots to proliferate and expand to form root nodules, hindering the root system from absorbing and conducting water and nutrients. [0003] The active substance sphingosine in the fermentation broth of Chaetomium globosa can inhibit the germinatio...

AI Technical Summary

Problems solved by technology

The control effect of Chaetomium globosa and its metabolites can be used as the line of defense of biological seed coating agents to resist the invasion of pathogenic bacteria early, and can solve the problems of reduced control efficiency of some existing biological seed coating agents in the field and lack of control persistence of some seed coating agents