Studies on the Effects of Systematic Applications of Several Insecticides on the Population of the Brown Planthopper, Nilaparvata lugens Stal. II. Some Properties of Buprofezin (Applaud) and Isoprothiolane (Fuji-one) in their Effects upon the BPH Population

살충제의 체계적 처리에 의한 벼멸구개체군밀도 억제효과에 관한 연구 II. Buprofezin(Applaud)과 Isoprothiolane(Fuji-one)의 벼멸구개체군 밀도억제에 미치는 몇가지 생물학적특성

  • 배윤환 ;
  • 현재선
  • Published : 1989.06.01

Abstract

To investigate the possibility of the BPH control by systematic application of insecticides, biological effects of buprofezin and isoprothiolane upon the BPH population was evaluated in the laboratory and pot. Both chemicals did not affect the developmental period of the nymphal stage with the applied dosages. When the buprofezin treated instar nymph was developed to the adult, adult's longevity was fairly reduced and such an effect of buprofezin was greater upon the younger instar nymphs. Residual effect of buprofezin was about 30 days in the pot. And it could suppress the BPH population when the younger instar nymphs were dominant age group in the population at the time of treatment. Isoprothiolane was also more effective for the suppression of the BPH population when the younger instar nymphs were dominant at the time of treatment. And it was expected that by buprofezin treatment in July the control effect of isoprothiolane against the BPH population could be maximized when it was treated to control the rice neck blast in late July or early August, because buprofezin could induce the biased population age distribution in which younger instar nymphs were main group at the time of isoprothiolane treatment.

Keywords

BPH;population;insecticides;buprofezin;isoprothiolane