Abstract: By optimizing the process of mechanical nitrogen-filling adjustment equipment, the time of the oxygen concentration drops during the mechanical nitrogen filling process was reduced. The rapid insecticidal technology for environmentally friendly protection of tobacco leaves was researched and the killing effect of different carbon dioxide concentrations on tobacco beetles under hypoxic conditions was verified. The results showed that by optimizing the process of the mechanical nitrogen-filling adjustment equipment, the time for the oxygen concentration of the tobacco leaf stack to drop to the effective insecticidal concentration could be reduced, and the use of carbon dioxide could quickly kill the tobacco beetles under low oxygen conditions. Environmentally friendly rapid insecticidal technology based on mechanical nitrogen charging could be used as an effective method for tobacco pest control.

Key words: mechanical nitrogen filling, carbon dioxide, tobacco leaves, Lasioderma serricorne （Fabricius）