Efficacy of NC-194 against three kinds of house dust mites, Dermatophagoides farinae, Dermatophagoides pteronyssinus and Tyrophagus putrescentiae

Abstract

Control efficacy of a pyridazinone derivative, NC-194,which is under development as a potent agricultural insecticide was evaluated against three kinds of house dust mites, Dermatophagoides farinae, Dermatophagoides pteronyssinus and Tyrophagus putrescentiae, by the medium mixing method. NC-194 is very effective against Dermatophagoides mites and suppressed more than 90% of the population growth of D. farinae and D. pteronyssinus at a concentration of 25ppm during 4 weeks. The chemical showed 95.4% suppression of the population growth against T. putrescentiae at the dose of 50ppm 2 weeks after the treatment.