Experimental Studies on Boring Ability of Oryzaephilus surinamensis Linné, Plodia interpunctella Hübner and Cadra cautella Walker on Packing Materials

Abstract

The laboratory-raised strains of Oryzaephilus surinamensis Linné, Plodia interpunctella Hübner and Cadra cautella Walker were placed into specially equipped bait test tubes, to examine whether they have abilities of boring several packing materials or not. The test tubes were then incubated at about 28°C with about 75% humidity. The packing materials used in this experiment were glassine, dampproof cellophane, polyethylene, polypropylene, aluminum, vinyl coat aluminum and laminated aluminum. As results, the strong defensive abilities against the boring of the insects were observed on aluminum, and then on polypropylene. These two materials have several different characteristics, and in use, they will help each other. It is desirable to use vinyl coat aluminum or laminated aluminum for the packing of confections in order to protect them from the insect damages.