This study was carried out to determine the sprouting period of early and mid-season varieties, which includes ‘Atlantic’, ‘Chubaek’, and ‘Superior’, during the summer storage period in a semi-underground warehouse without cooling system. And also it was investigated the effect of chlorpropham [Propan-2-yl N-(3-chlorophenyl)carbamate, CIPC] treatment on the sprouting inhibition for the varieties. This study was conducted to figure out a sprout inhibitory effect when CIPC was applied to 1kg of the potato tubers at concentrations of 10 mg and 20 mg which are lower than the treatment concentrations of ca 30 mg prescribed by the positive list system (PLS). The internal temperature of the warehouse used in this experiment was lowered by 5°C or more than the outside temperature. The difference between the lowest and highest temperature during the experiment throughout the day was 5°C. It showed the effect of reducing to 1/2 of the difference in outdoor temperature. As for the sprouting of potatoes, the extremely early variety ‘Chubaek’ sprouts appeared at the 6th week of storage of control and it was the fastest sprouting potato among the control groups of the varieties. Sprouting began to appear in the Superior at the 6th week of storage, while the ‘Atlantic’ sprouted at the 8th week of storage. The appearance of sprouts was suppressed in all treatment groups of ‘Atlantic’ and ‘Superior’ varieties in CIPC treatments. Sprouts were observed in all treatment groups of ‘Chubaek’ after the 7th week, but the elongations of the sprouts in tubers were completely inhibited until the 8th week of storage. ‘Atlantic’ and ‘Superior’ seemed to have a sprouting inhibitory effect even with a low CIPC concentration of 10 mg·kg-1, with the exception of extremely early variety ‘Chubaek’ that breaks out of the dormancy quickly. Although weight loss occurred continuously during storage, it was minor loss of 0.7-1.6%. There was no consistent trend for changes of the loss in the varieties and CIPC treatments. Most common pathological disorder was the dry rot during the experiment, but only few were affected. The use of the tubers treated at 18°C and 90% RH for 10 days and the rack of refrigeration system which lead to lack of convection seemed to have suppressed the spread of pathogens.

Abstract
서 론
재료 및 방법
    1. 식물재료
    2. 수확후 처리 및 저장
    3. 조사항목
    4. 병원균의 분리 및 동정
    5. 통계분석
결과 및 고찰
    1. 저장고 내·외부 온습도 차이
    2. 맹아 억제 효과
    3. 무게 감모율
    4. 호흡 및 기체 발생
    5. 병리장해
적 요
사 사
Literature Cited

• 한규석(강원도농업기술원 감자연구소 연구사) | Kyusuk Han (Research Officer, Potato Research Institute, Gangwon Agricultural Research & Extension Services)
• 김병섭(강릉원주대학교 식물생명과학과 교수) | Byung-Sup Kim (Professor, Department of Plant Science, College of Life Sciences, Gangneung-Wonju National University)
• 홍세진(강릉원주대학교 식물생명과학과 교수) | Sae Jin Hong (Professor, Department of Plant Science, College of Life Sciences, Gangneung-Wonju National University)
• 이영훈(강릉원주대학교 동해안생명과학연구원 연구교수) | Young Hun Lee (Research Professor, East Coast Life Science Research Institute, Gangneung-Wonju National University) Corresponding Author