Field evaluation of conidia of Beauveria bassiana (Balsamo) Vuillemin strain CS-1 against diamondback moth larvae

포장에서 배추좀나방에 대한 백강균 CS-1의 방제효과

  • Yoon, Cheol-Sik (Department of Crop Protection, National Institute of Agricultural Science and Technology, RDA) ;
  • Yoon, Tae-Joong (Department of Agricultural Biology, College of Natural Resource, Korea University) ;
  • Park, Hyun-Soo (Department of Crop Protection, National Institute of Agricultural Science and Technology, RDA) ;
  • Lee, Sang-Guei (Department of Crop Protection, National Institute of Agricultural Science and Technology, RDA) ;
  • Yoo, Jai-Ki (Department of Crop Protection, National Institute of Agricultural Science and Technology, RDA) ;
  • Lee, Jeang-Oon (Department of Crop Protection, National Institute of Agricultural Science and Technology, RDA)
  • 윤철식 (농업과학기술원 작물보호부) ;
  • 윤태중 (고려대학교 농생물학과) ;
  • 박현수 (농업과학기술원 작물보호부) ;
  • 이상계 (농업과학기술원 작물보호부) ;
  • 유재기 (농업과학기술원 작물보호부) ;
  • 이정운 (농업과학기술원 작물보호부)
  • Published : 1998.09.30

Abstract

The efficacy of conidia of Beauveria bassiana (Balsamo) Vuillemin strain CS-1 that showed high mortality in laboratory and net house was examined against diamondback moth larvae in the field. Conidia ($4{\times}10^{7}$ conidia/ml) were applied to larvae on chinese cabbage in a 1.5% emulsifiable oil-emulsion amended with 4% clay at a volume of 0.55 L/3.3 $m^{2}$. There were no significant differences among plants and replicates in the deposition of spray droplets on water-sensitive papers or of conidia on leaves and larvae. Weather conditions were rainy and cool during first few days, and then hot and dry. Persistence of conidia was equally short on both leaves and larvae. Nevertheless, treatment of B. bassiana potentially reduced larval populations. But the field efficacy was lower than the laboratory efficacy. This reduced efficacy was ascribed to unfavorable environmental conditions.

Keywords

Beauveria bassiana strain CS-1;field efficacy;diamondback moth