The Korean Journal of Pesticide Science (농약과학회지)

The Korean Society of Pesticide Science (한국농약과학회)
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Control Efficacy of Mixed Application of Microbial and Chemical fungicides against Powdery mildew of red-pepper

미생물 농약과 유기합성 살균제 혼용에 따른 고추 흰가루병 방제 효과

  • Hong, Sung-Jun (Organic Agriculture Division, National Academy of Agricultural Science(NAAS), RDA) ;
  • Kim, Jung-Hyun (Organic Agriculture Division, National Academy of Agricultural Science(NAAS), RDA) ;
  • Kim, Yong-Ki (Organic Agriculture Division, National Academy of Agricultural Science(NAAS), RDA) ;
  • Jee, Hyeong-Jin (Organic Agriculture Division, National Academy of Agricultural Science(NAAS), RDA) ;
  • Shim, Chang-Ki (Organic Agriculture Division, National Academy of Agricultural Science(NAAS), RDA) ;
  • Kim, Min-Jeong (Organic Agriculture Division, National Academy of Agricultural Science(NAAS), RDA) ;
  • Park, Jong-Ho (Organic Agriculture Division, National Academy of Agricultural Science(NAAS), RDA) ;
  • Han, Eun-Jung (Organic Agriculture Division, National Academy of Agricultural Science(NAAS), RDA) ;
  • Goo, Hyung-Jin (Gimpo-city Agricultural Technical Center) ;
  • Choi, Kwang-Young (Pocheon-city Agricultural Technical Center)
  • 홍성준 (국립농업과학원 유기농업과) ;
  • 김정현 (국립농업과학원 유기농업과) ;
  • 김용기 (국립농업과학원 유기농업과) ;
  • 지형진 (국립농업과학원 유기농업과) ;
  • 심창기 (국립농업과학원 유기농업과) ;
  • 김민정 (국립농업과학원 유기농업과) ;
  • 박종호 (국립농업과학원 유기농업과) ;
  • 한은정 (국립농업과학원 유기농업과) ;
  • 구형진 (김포시농업기술센터) ;
  • 최광영 (포천시농업기술센터)
  • Received : 2014.11.06
  • Accepted : 2014.12.01
  • Published : 2014.12.31
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Abstract

This study was conducted to reduce the using amount of chemical fungicides for the control of red-pepper powdery mildew. Effect of combined application of three microbial fungicides and six chemical fungicides for the control of red-pepper powdery mildew was examined in vitro, in pot assay and under field condition. One chemical fungicide (Azoxystrobin+Chlorothalonil) among six chemical fungicides significantly suppressed three microbial fungicides (Bacillus subtilis Y1336, Bacillus subtilis DBB1501, Bacillus subtilis QST-713) registered for the control of pepper powdery mildew in vitro. In the pot assay, two mixed application such as B. subtilis DBB1501+Trifloxystrobin, B. subtilis QST713+Trifloxystrobin among nine mixed applications of three microbial fungicides and three chemical fungicides showed the highest suppressive effect against red pepper powdery mildew. Also, suppressive effect of the mixed application of B. subtilis QST713 and Trifloxystrobin was similar to that of single application of three chemical fungicides(Myclobutanil, Trifloxystrobin, Hexaconazole). In the field test, when the microbial fungicides (B. subtilis DBB1501, B. subtilis QST713) and the chemical fungicide (Trifloxystrobin) for the control of powdery mildew of red pepper were mixed foliar sprayed four times at 7 day-intervals, the control values were in the range of 70.3% to 70.9%. On the other hand, when each of the chemical fungicide (Trifloxystrobin) was foliar sprayed four times at 7 day-intervals, the control value was 72.7%. Consequently, the mixed application of the microbial fungicides and chemical fungicides could be recommended as a one of control measures for reducing the using amount of chemical fungicides.

본 연구는 고추 흰가루병 방제시 유기합성 살균제의 사용량을 감소하기 위하여 수행되었다. 고추 흰가루병 방제를 위하여 3종의 미생물 농약과 6종의 살균제의 혼용처리 효과를 실내, 포트, 포장에서 확인하였다. 실내시험에서 6종의 화학농약 중 Azoxystrobin+Chlorothalonil이 고추 흰가루병에 등록된 3종의 미생물 농약(Bacillus subtilis Y1336, Bacillus subtilis DBB1501, Bacillus subtilis QST-713)의 유효미생물의 생육을 억제 시켰다. 포트검정 결과 9개의 혼용처리구 중 B. subtilis DBB1501+Trifloxystrobin, B. subtilis QST713+Trifloxystrobin 처리구 조합이 흰가루병에 대해서 가장 높은 억제 효과를 나타내었으며, 특히 B. subtilis QST713+Trifloxystrobin 혼용처리조합은 3종의 화학농약(Myclobutanil, Trifloxystrobin, Hexaconazole) 단독처리와 비슷한 억제효과를 나타내었다. 포장시험에서는 흰가루병 방제를 위하여 미생물 농약(B. subtilis DBB1501, B. subtilis QST713)과 유기합성 살균제(Trifloxystrobin)을 혼용하여 7일 간격 4회 엽면살포 시 70.3%~70.9%의 방제가를 나타내었으며, Trifloxystrobin을 단독처리 하였을 경우에는 72.7%의 방제가를 나타내었다. 결과적으로 미생물 농약과 화학농약의 혼용은 화학농약의 사용량을 절감할 수 있는 가능한 방법으로 추천할 수 있다고 판단되었다.

Keywords

References

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