Storage device for aluminum phosphide for insect disinfestation of tobacco and insecticidal method

Abstract

The invention provides a storage device for aluminum phosphide for insect disinfestation of tobacco and an insecticidal method, belongs to the technical field of processing engineering, and aims at solving the problem that due to the fact that the release rate of aluminum phosphide for insect disinfestation of the tobacco is nonuniform, insect disinfestation is not thorough. According to the technical scheme, the storage device for aluminum phosphide for insect disinfestation of the tobacco comprises an aluminum phosphide storage body which is provided with one or more vent holes for inside and outside air exchange of the storage device. The storage device for aluminum phosphide for insect disinfestation of the tobacco and the insecticidal method have the advantages that the insecticide applying method is improved, the storage characteristic for long-time storage of the tobacco is combined, the effective sealing fumigation time is prolonged on the condition that the insecticide dosage is not increased, insects in all insect states can be effectively controlled, the insecticidal effect is improved, storage of the tobacco is not affected, no influence on natural alcoholization of the tobacco exists, the concentration of hydrogen phosphide in a fumigation heap is low during the sealing fumigation period, the fumigation safety can be improved, and use is very convenient.

Description

technical field [0001] The invention belongs to the technical field of processing engineering, specifically, an aluminum phosphide storage device and a method for killing insects in tobacco leaves are designed. Background technique [0002] The aluminum phosphide fumigation method is the most commonly used method for killing insects on tobacco leaves. The principle is that aluminum phosphide tablets absorb moisture in the air and release phosphine gas, which can penetrate into the tobacco leaf box, contact pests, and enter the pests. In vivo, poisons the pests, thereby killing the pests. [0003] At present, the general tobacco leaf fumigation method is to fumigate the tobacco leaves and seal them with a sealing material, and then use an open application tray or dish to apply the pesticide. The aluminum phosphide in the application tray is combined with the moisture in the air and quickly decomposes to produce Phosphine gas generally reaches the highest concentration (up ...

AI Technical Summary

Problems solved by technology

[0003] At present, the general tobacco leaf fumigation method is to fumigate the tobacco leaves and seal them with a sealing material, and then use the medicine application tray or the open dish to apply the medicine. Phosphine gas generally reaches the highest concentration (up to 1000 ppm or more) in 2-3 days, and then the concentration decreases rapidly. Due to the high concentration at once, it is easy to cause protective coma in pests, and the effective concentration does not last long enough. (Generally not more than 20 days), often can not achieve the ideal fumigation insecticidal effect, especially for the eggs and pupae of tobacco pests such as tobacco beetles.

However, it is generally believed that the pest state can be best controlled at a lower fumigation concentration (about 200ppm, but not less than 100ppm) and a longer poison gas contact time (up to 1-2 months).

[0004] At present, the general tobacco leaf fumigation method adopts fully open spraying, and there is no way to control the decomposition rate of aluminum phosphide, so that the phosphine gas is produced very quickly, which is not conducive to efficient killing of tobacco leaf pests, but also makes aluminum phosphide fumigation (phosphine is easy to spontaneously ignite at a higher concentration), and at the same time, it is not conducive to maintaining the concentration of phosphine gas in the fumigation pile for a long time