Insect-killing method for tobacco leaves

Abstract

The invention discloses an insect-killing method for tobacco leaves, which comprises the following steps of: 1, determining a pile location, placing a bottom membrane of a tent at the pile location; 2, piling a tobacco pile on the base membrane of the tent; 3, covering a cover membrane so that the whole tobacco pile is wrapped in the tent; 4, sealing the bottom membrane of the tent with the cover membrane together; and 5, discharging air in the tent, introducing dried nitrogen or inert gas in the tent, or introducing dried nitrogen or inert gas in the tent when discharging the air in the tent. By adopting the insect-killing method for the tobacco leaves, in a very short time range, concentration of oxygen in the sealed pile can be reduced to below 2 percent, the temperature is controlled to be 20-35 DEG C, and the humidity is controlled to be 55-75 percent. The state of the tobacco leaves is kept for above 8 days, the death rate of tobacco storage pests reaches above 99 percent, and the tobacco leaves are not mildewed.

Description

technical field [0001] The invention relates to an insecticidal method for tobacco leaves which are used to prevent insects and mildew under tobacco storage conditions, and are beneficial to alcoholization and long-term storage of tobacco leaves. Background technique [0002] Tobacco leaf is a commodity that is difficult to store and maintain, and it is prone to insect damage, mildew, and smashing during the storage and alcoholization process. According to relevant statistics, a medium-sized cigarette company causes a decline in the quality of tobacco leaves due to insect pests, mildew, and crushing during the natural aging process of tobacco leaves every year, causing direct economic losses of more than 20 million yuan. [0003] The tobacco industry currently stores flakes mainly by using phosphine gas for fumigation to kill insects. Because phosphine is a highly toxic, flammable, and explosive gas, if it is not handled properly, it will easily cause phosphine to spontaneo...

AI Technical Summary

Problems solved by technology

The biggest defect of this method is: the time required to form a good storage environment is too long, and it generally takes more than one month to reduce the oxygen concentration in the closed space to below 2%, that is, it takes more than one month to reduce the oxygen concentration in the closed space. Pest killing in smoke storage environment

The existing modified atmosphere curing agents all use chemical substances to reduce oxygen to kill insects, but none of them have functions such as humidity adjustment and temperature adjustment. In the storage environment of tobacco leaves, changes in temperature and humidity have a greater impact on tobacco leaves. Changes in humidity (mainly referring to high-temperature, high-humidity environments) can easily cause mildew in tobacco leaves, thereby reducing the quality of tobacco leaves

According to relevant reports, the investigation and statistics of some tobacco companies show that at least 2% of the tobacco leaves in storage every year will go moldy, which has caused great economic losses to the companies.