2019 ASHS Annual Conference
Effective Management of Kiwifruit Ripe Rot Caused By Botryospaeria Dothidea in Korea
Yunhee Seol1, Seungeun Gi1, Juhwa Yoon1, Su-Hyun Kim1, Hye-sung Cho2, Jung-An Jo3, and Kwang-Yeol Yang1,*.
1Department of Applied Biology, College of Agriculture and Life Science, Chonnam National University, Gwangju 61186, Republic of Korea; 2Fruit Research Institute of Jeollanam-do Agricultural Research and Extension Services, Jeonnam, Haenam-gun 59021, Republic of Korea; 3Kiwifruit Export Research Organization, Chonnam National University, Gwangju 61186, Republic of Korea
In order to find out the effective control methods against the major fungal diseases of kiwifruit grown in Boseong and Haenam regions of Jeonnam provinces in Korea during 2018-19, we have isolated pathogens from rotten kiwifruit during the shelf-life period. Total 107 pathogens species were isolated and only four species were identified as the main pathogens such as Botryospaeria dothidea, Alternaria alternata, Pestalotiopsis sp. and Phomopsis sp., with 32.7%, 26.1%, 26.1%, and 15.1%, identification rate, respectively. Ripe rot caused by B. dothidea, was firstly found in overripe kiwifruits (Actinidia deliciosa) during a disease survey conducted in Jeju and Jeonnam provinces in Korea in 1999. B. dothidea usually infects young fruits by wind-borne ascospores after pollination, but it is also known that the disease does not appear until the fruits begin to be ripen. The common method for ripe rot controlling is fungicide application. However, there are almost rare effective fungicides available for ripe rot management of kiwifruits. It was performed to investigate the occurrence of resistance against fungicides of different classes, which are the most commonly used in the field during the growing period and some of isolated were found to be resistant to a fungicide of a specific class. These results may be helpful in establishing a control system to effectively manage kiwifruit ripe rot.
* This study was financially supported by the IPET through Kiwifruit Export Research Organization, funded by Ministry of Agriculture, Food and Rural Affairs, Republic of Korea.
Keywords: Kiwifruit ripe rot, Botryospaeria dothidea, Fungicide resistance.