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Outbreak of Fire Blight of Apple and Pear and Its Characteristics in Korea in 2019
Res. Plant Dis. 2020;26:239-249
Published online December 31, 2020
© 2020 The Korean Society of Plant Pathology.

Hyeonheui Ham1, Kyong Jae Lee2, Seong Jun Hong2, Hyun Gi Kong1, Mi-Hyun Lee1, Hyun-Ran Kim1, and Yong Hwan Lee1*

1Crop Protection Division, National Institute of Agricultural Sciences, Rural Development Administration, Wanju 55365, Korea
2Disaster Management Division, Extension Service Bureau, Rural Development Administration, Jeonju 54875, Korea
Tel: +82-63-238-3313
Fax: +82-63-238-3838
Received September 28, 2020; Revised November 8, 2020; Accepted November 10, 2020.
cc This is an open access article distributed under the terms of the Creative Commons Attribution Non-Commercial License ( by-nc/4.0/), which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
To find out the cause of the fire blight outbreak in apples and pears of Korea in 2019, we investigated disease appearing situation of thirty fire blight infected orchards, and interviewed farmers to determine the cultivation characteristics. Fire blight occurred mostly in orchards that had infected more than 2 years before. The cause of this were as follows: farmers did not know the symptoms of the disease properly. It is presumed that it has spread from the first occurrence to the surrounding orchards by flower-visiting insects or farmers and to a short distance or a long distance by the same cultivator or co-farmer. These series of processes repeated in the newly spreading area, and then disease reports increased as farmers became aware of fire blight. To minimize the spread of fire blight in Korea, it suggested that thorough education of farmers for early diagnosis and quantitative detection technology that can diagnose even in no symptom showing plants. And chemical or biological spraying systems suitable for domestic cultivation methods, which are producing large fruits, and molecular epidemiological studies of pathogens.
Keywords : Apple, Fire blight, Outbreak characteristics, Pear

December 2020, 26 (4)