Experiments on Pest Control in Tobacco Storage by Fumigating Carbon Dioxide and Phosphine Mixture

In order to reduce applied rates of aluminium phosphide, pest control experiments using the mixture of bottled liquefy carbon dioxide and 56% aluminium phosphide troche as fumigant were conducted with computer-controlled outdoor mixing and fumigating device. The result showed that the control effect was 100% by fumigating the mixture of 2.3g/m 3 aluminium phosphide and 12g/m 3 carbon dioxide. By using less aluminium phosphide, this method was safer and could reduce environment pollution.