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파프리카 흰가루병 방제용 난황유의 유화특성과 유황수화제와의 혼용 시 방제효과

Emulsification Characters of COY (Cooking Oil and Egg Yolk Mixture) and Mixing Application with Sulfur Wettable Powder for Enhancing the Control Efficacies against Paprika Powdery Mildew

  • 이정한 (경상대학교 자연과학대학 화학과) ;
  • 한기수 (경상대학교 농업생명과학대학 응용생물환경학과) ;
  • 배동원 (경상대학교 공동실험실습관) ;
  • 권영상 (경상대학교 농업생명과학대학 응용생물환경학과) ;
  • 김동길 (경상대학교 생명과학 연구원) ;
  • 강규영 (경상대학교 응용생명과학부) ;
  • 김희규 (경상대학교 농업생명과학대학 응용생물환경학과)
  • Lee, Jung-Han (Department of Chemistry Gyeongsang National University) ;
  • Han, Ki-Soo (Department of Applied Biology, College of Agriculture and Life Sciences, Gyeongsang National University) ;
  • Bae, Dong-Won (Central Instrument Facility, Gyeongsang National University) ;
  • Kwon, Young-Sang (Department of Applied Biology, College of Agriculture and Life Sciences, Gyeongsang National University) ;
  • Kim, Dong-Kil (Research Institute of Life Science, Gyeongsang National University) ;
  • Kang, Kyu-Young (Division of Applied Life Science(BK 21 program), Gyeongsang National University) ;
  • Kim, Hee-Kyu (Department of Applied Biology, College of Agriculture and Life Sciences, Gyeongsang National University)
  • 투고 : 2009.11.17
  • 발행 : 2010.04.01

초록

2009년 6월에서 7월까지 경남 농업술원 ATEC 센터의 시설 하우스 내에서 파프리카에 발생한 흰가루병에 대하여 실험한 결과이다. 난황유 제조시 물 첨가량에 따른 유화 및 과일표면을 비교한 결과 50 ml과 100 ml의 물을 첨가하였을 때는 응집력이 강하지 않아 물에 균일하게 잘 분산되었다. 식용유가 완전히 유화되지 못한 것과 유화된 것을 살포하여 1주일 후 파프리차 과일의 표면을 비교한 결과 완전히 유화되지 못한 난황유의 경우 과일표면에 기름성분으로 덮여있는 것이 관찰되었다. 난황유 및 혼합제의 처리는 난황유 단독 처리구와 혼합제 처리구에서 병재발생이 억제되는 것으로 관찰되었으며, 혼합제 1,000배 와 5,000배를 처리한 구에서 난황유를 단독처리한구보다 병 재발생이 더 억제되어 유의차가 인정되었다. 난황유 및 혼합제의 처리에 의한 흰가루병 발병억제 지속효과는 난황유와 혼합제 처리구에서 병 재발생 면적 증가율이 다른 물처리와 유황수화제처리보다 낮은 것으로 나타났으며, 3주가 경과하여도 재발생 억제효과가 지속되었으나 4주차에서는 난황유와 혼합제(1,000, 5,000, 10,000배)가 각의 처리구 모두 재발생 면적이 조금씩 나타났다.

Emulsification characters were investigated for COY (Cooking oil and Egg Yolk Mixture) and control efficacies of COY was enhanced by supplemented Sulfur wp. against paprika powdery mildews. Amount of water added to one egg yolk and 100 ml olive oil affected tbe homogenization of mixtures to emulsion profoundly; those premixes with 5~10 ml water were too concentrated to be homogenized, hence not dispersible in water; those with 15~20 ml water were homogenized, but tended to flocculation and not readily dispersible in water, suggesting the instability of emulsion; and those with 50 or 100 ml water were homogenized well and was readily dispersible in water to stable emulsion over long period of time. It was further confirmed that those fruits sprayed with not-fully emulsified COY revealed the oily membranes or blotches on their surfaces, whereas the ones with fully emulsified COY revealed normal clean surfaces. Treatment of COY either alone or in supplementation with Sulfur wettable powder (sulfur wp) were also effective in suppressing the recurrence of powdery mildew signs, wbich had disappeared in three days of foliar application. Still, the COYs supplemented with sulfur wp (COY+sulfur wp) at 1,000x or 5,000x were significantly effective in suppression against the symptomlsign recurrence over COY or sulfur wp alone.

키워드

참고문헌

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피인용 문헌

  1. Yield Loss Assessment and Determination of Control Thresholds for Powdery Mildew of Eggplant (Solanum melongena) vol.20, pp.2, 2016, https://doi.org/10.7585/kjps.2016.20.2.145