Comparative Toxicities of Selected Acaricides against the Twospotted Spider Mite(Tetranychus urticae Koch) to Establish the Screeing System for New Acaricidal Chemical Compounds

스크리닝체제 확립을 위한 점박이응애에 대한 몇가지 살비제의 약효 비교

  • 조점래 (한국화학연구소 스크리닝연구센터) ;
  • 최용호 (한국화학연구소 스크리닝연구센터) ;
  • 박노중 (한국화학연구소 스크리닝연구센터) ;
  • 조광연 (한국화학연구소 스크리닝연구센터)
  • Published : 1993.06.01

Abstract

The comparative toxicities of selected acaricides against the twospotted spider mite, Tetranychus urticae, were investigated. The ovicidal and adulticidal activities of selected acaricides were examined under different developmental stages. Fenpyroximate showed high activity throughout all developmental stages of mites. The oviposition inhibition effect of fenpyroximate was more highly effective than that of cyhexatin. At 100 ppm concentration, the effect of fenpyroximate on the residual oviposition inhibition was persistant during 25 days with 85% level, while the effect of cyhexatin gradually decreased, and then decreased to 40% at 25 days after treatment. Fenpyroximate at 100 ppm showed 100% knockdown activity within 3 hour while cyhexatin showed only 91% knockdown activity within 24 hours after treatment. Most of selected acaricides had no systemic activity, but metasystox at 800 ppm had 100% of the systemic activity at 24 hours after treatment. For the influence of temperature on the activity, fenpyroximate showed stable activity and no temperature-dependent in comparison with other selected adaricides.