배 "신고"의 생육기에 나타나는 과피얼룩과의 발생 요인

• Published in: 한국환경농학회지 Vol. 33; no. 3; pp. 198 - 204
• Main Authors: 문병우, Byung Woo Moon, 남기웅, Ki Woong Nam, 문영지, Young Ji Moon
• Format: Journal Article
• Language: Korean
• Published: 한국환경농학회 30.09.2014
• Subjects: Coating agent; Fruit skin stain; Gibberellin paste; Lime sulfur; Niitaka pear
• ISSN: 1225-3537

‘신고’배에서 나타나는 과피얼룩과 발생을 경감하기 위하여 생육기 동안 몇 가지를 처리한 결과는 다음과 같다. 배과피얼룩 증상은 유과기(5월 25일)부터 발생하기 시작하여 수확 시까지 나타났으며 과육에는 전혀 발생하지 않았다. 과피 얼룩과 발생은 수세가 정상적인 나무, 지베렐린 과경 도포 처리에서 현저하게 낮았으나, 아미노산 수체살포는 큰 차이가 없었다. 봉지에서는 칼슘이 코팅된 봉지 및 석회유황합제가 코팅된 봉지에서 과피얼룩과 발생이 낮았다. 봉지 내지에 석회유황합제 및 콩기름 도포는 과피얼룩이 아닌 약해를 유발시켰다. 과피얼룩 발생과의 수피 및 과피는 K 농도가 높았으나 엽에서는 T-N 및 K 농도는 오히려 낮았다. fruit skin stain results in serious damages to pear fruit. Particularly susceptible to this damage, ‘Niitaka’ pearaccounts for 82% of pear cultivation in Korea and manyfarmers growing the pear trees have suffered economiclosses due to fruit skin stain. This study investigated theeffect of different treatments of ‘Niitaka’ pear duringgrowing period on the occurrence of fruit skin stain. METHODS AND RESULTS: The treatments in the fieldincluded gibberellin (GA) paste, spraying with amino acidtree fertilizer, functional bagging, and coating of the innerpaper bag with agents. The relationships between tree vigor,mineral nutrition concentration and fruit skin stainoccurrence were also investigated. The fruit skin stainsymptoms occurred from young fruit (May 25) until harvest. There was no exposed fruit flesh. The occurrence of fruitskin stain was significantly reduced in normal tree (shootlength 110 cm), as well as using GA paste treatment, andbagging in calcium and lime sulfur coated bags. However,spraying with amino acid tree fertilizer made no differencein comparison to control. In addition, bags in which theinner paper was coated with lime sulfur and soybean oilresulted in chemical injury to the fruit skin caused bybagging. The K concentration of shoot wood and fruit skinwere higher than those of the control. Also, there were lowerT-N, K concentration of leaf. CONCLUSION: These results suggest that occurrence offruit skin stain in ‘Niitaka’ pear fruits during the growingperiod can be reduced by GA paste and bagging in calciumand lime sulfur coated bags. The symptoms of chemicalinjury to the fruit skin caused by bagging in lime sulfur andsoybean oil coated inner paper were different compared toskin stain occurring in fruit during the growing period.