Effect of insecticide-impregnated paper sheets against the house dust mite, Dermatophagoides farinae

Abstract

This report concerns the effect of insecticide-impregnated paper sheets on the market against house dust mites, Dermatophagoides farinae. Four kinds of the sheets impregnated with phenothrin or permethrin were tested in the laboratory. The suppression rates of population growth were 0 to 8.4% and 2.3 to 36.1% after 2 weeks and 4 weeks, respectively when the initial mite density was 37 individuals in 0.2g feed, and the rates were 10.6 to 35.9% and 27.2 to 64.2% after 2 weeks and 4 weeks, respectively when the initial density was 274 individuals. The sheets impregnated with permethrin were more effective than those impregnated with phenothrin, but were incompletely effective.