Resistance test for different pasta packagings to the massive and repeated attack by Plodia interpunctella larvae (Lepidoptera: Pyralidae) and Sitophilus oryzae adults (Coleoptera: Dryophthoridae)

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Abstract: Pasta infestation discovered by the consumers is often caused by stored-grain pests that manage to enter in the packaged product on the shelves of the retail outlets, breaking through the package wall or passing through existing openings.In this study 2 types of pasta packages by 3 different brands, with different characteristics in terms of construction material (cardboard, plastic and plastic-coated paper) and presence/absence of micropores, were exposed to the massive and repeated attack by Plodia interpunctella (Hbn.) larvae and Sitophilus oryzae (L.) adults, in order to evaluate their resistance to penetration.The results showed that packaging with micropores were on average more susceptible to the penetration of P. interpunctella and S. oryzae compared to those without. The cardboard cases resulted more resistant than the others, while the more susceptible material was plastic-coated paper.

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