Bacterial fruit blotch (BFB) is one of most important diseases in Cucurbitaceae due to infection of Acidovorax citrulli, causing huge economic losses damage worldwide. This seedborn disease spread rapidly at period of high temperature and humidity. The eco-friendly farming is getting popular. So far there was no effective agent to control BFB in eco-friendly farming. Therefore, effect of the material based on chinese nut-gall extract with antibacterial activity against BFB to was tested against A. citrulli. Different hosts showed various symptoms of BFB. Liquid formulation among exhibited most effective anti-bacterial activity on A. citrulli. Pot experiment in greenhouse showed the potential as an control agent of BFB in cucurbits. The treatment of material based on chinese nut-gall extract showed the positive effect on survival of the watermelon seedling and on the length of the cucumber seedling treated with A. citrulli. We cautiously conclude that the material based on chinese nut-gall extract used in this study may be good agents against major diseases of cucurbits in the future even though it is require to be tested with more study on field test.

Ⅰ. 서 론
 Ⅱ. 재료 및 방법
  1. Acidovorax citrulli와 배양
  2. 박과 식물의 BFB 증상
  3. 식물추출물 기반의 친환경제제의 제형 효과 검정
  4. 액상제형(BA)의 항세균 효과(in vitro)
  5. 액상제형(BA)의 항박테리아 효과분석(in vivo)
 Ⅲ. 결과 및 고찰
  1. 박과 식물에서 A. citrulli 접종에 의한 BFB 증상
  2. A. citrulli에 대한 식물추출물의 세균활성 효과 검정
 Ⅳ. 적 요
 References

• 서태진(전북대학교 농생물학과) | Seo Tae-Jin
• 양수정(전북대학교 농생물학과) | Yang Soo-Jeong
• 이봉춘(국립식량과학원) | Lee Bong-Choon
• 김강민(전북대학교 생명공학부) | Kim Kang-Min
• 이귀재(전북대학교 생명공학부) | Lee Kui-Jae
• 주호종(전북대학교 농생물학과, 식물의학연구센터, 농업과학기술연구소) | Ju Ho-Jong Corresponding authors