Two kinds of pheromone traps,Biolure® for pyralid moths and New Serrico® for cigarette beetles, were used in a factory producing animal foods and three ordinary houses in Shizuoka Prefecture, Japan, from spring through the fall in 1992.
Three species of pyralid moths were caught in high numbers in the factory. The most abundant was Ephestia kueniella, followed by E. cautella and then Plodia interpunctella. In the three houses, however, only P. interpunctella moths were caught abundantly ; seven E. cautella moths and no E. kueniella moths.
Many cigarette beetles, Lasioderma serricorne, were caught in the factory from May to October (inclusive) with the first peak in July and the second in October. Each of the three houses showed only one peak late in August or early in September, no or very few individuals in the other months.
No breeding site for the species was found in the three houses. One of the houses that had an especially high density of the insects during the peaks had poorer seailing conditions, having so many voids and crevices in the wall as well as ill―fitting doors and windows.
These facts suggest that the insects may invade consumers' houses from outdoors or nearby fascilties, causing insects contamination of foods at home.
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