Method for applying methyl bromide fumigation agent to kill Tilletia controversa Kuehn

Abstract

The invention relates to a treatment method of a Tilletia controversa Kuhn (TCK) of wheat, in particular to a method to kill the TCK of the wheat through a methyl bromide fumigant. The method comprises that: the wheat with the TCK is enclosed into a closed space, and the methyl bromide with a weight ratio concentration of 98 percent is put into the closed space holding the wheat to fumigate the wheat. The fumigation is carried out in a preset dosage (180g / m<3>, 90g / m<3>) and at the ambient temperature (20 DEG C) and under the relative humidity of 60 to 70 percent; the fumigating time is 120h in the dosage of 180g / m<3> for one time, and 2 multiplied by 120h in the dosage of 90g / m<3> for two times. The method can kill the TCK of the wheat by 100 percent, and the operation is safe, reliable and can be widely popularized and applied.

Description

technical field [0001] The invention relates to a method for treating Tilletia controversa Kühn (TCK), in particular to a method for killing Tilletia controversa Kühn by using a methyl bromide fumigant. Background technique [0002] TCK is a dangerous fungal disease that is the most harmful among wheat diseases and difficult to control and eradicate completely. The systemic infection of the pathogen dwarfs the wheat plants, and the grains on the diseased ears are replaced by black powder. Generally, in popular years, wheat production can be reduced by 30% to 50%, and when it is seriously damaged, the production reduction can be as high as 75%. Some people in China have conducted investigations, and the TCK blighted wheat stored in the granary for 5 years still has biological activity. The teliospores and galls of the TCK pathogen can travel long distances with wheat. At present, the disease has spread to about 29 countries on five continents in the world, among which Nort...

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Problems solved by technology

[0003] The treatment of TCK blight wheat mainly includes heat treatment method, ethylene oxide fumigation method, and radiation sterilization method. The heat treatment method is not used due to the decline in wheat quality after treatment, limited processing capacity and slow speed; irradiation treatment Due to the poor flexibility of the electron beam irradiation device and the weak penetrating ability of the electron beam, it has not been widely used

Ethylene oxide fumigation technology is relatively mature, but because ethylene oxide is flammable and explosive, its practical application is affected. In recent years, there have been reports abroad on the bactericidal effect of methyl bromide on TCK in wheat seeds and soil, but this bactericidal Whether the effect can be applied to kill the wheat TCK pathogen remains to be concluded after conducting experiments and analysis