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Survey of Major Leaf Disease Occurred on Apple Tree in Korea from 1992-2010
Res. Plant Dis. 2018;24:249-256
Published online December 31, 2018
© 2018 The Korean Society of Plant Pathology.

Wonsu Cheon1*, Yun-Su Do2, Sun-Young Lee1, Kyung-Hee Choi3, Jong-Chul Nam1, Se Jin Kim1, and Dong-Hyuk Lee1

1Apple Research Institute, National Institute of Horticultural & Herbal Science, Gunwi 39000, Korea
2Fruit Research Division, National Institute of Horticultural & Herbal Science, Wanju 55365, Korea
3Planning and Coordination Division, National Institute of Horticultural & Herbal Science, Wanju 55365, Korea
*Tel: +82-54-380-3176 Fax: +82-54-980-3109 E-mail: applesident@korea.kr ORCID https://orcid.org/0000-0003-4577-2656
Received June 27, 2018; Revised August 23, 2018; Accepted September 3, 2018.
cc This is an open access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/4.0/), which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
Abstract
Disease occurrence in apple cultivars on 13-30 apple orchards from April to October 1992-2010 was investigated at 30 days intervals in Gyeongbuk, Gyeongnam and Jeonbuk provinces of Korea. Apple cultivar ‘Fuji’ was found most susceptible and is being damaged by cedar apple rust, scab, gray mold, Alternaria blotch and Marssonia blotch as major leaf diseases that were observed. The percentage of occurrence of these leaf diseases varies from every year. This variation is based on different rainfall and temperature conditions, cultivation, root stock and changed system of fungicide spray during the particular year and season.
Keywords : Alternaria blotch, Apple, Disease incidence, Marssonina blotch


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