Disease and Pest Occurrence in Fields of the Gangwon State-bred Potato Cultivar ‘Pungnong’ and Comparison of Control Effects of Registered Chemicals against Common Scab

Heon-Seop Won; Mi-Sun Jung; Ji-Hye Jang; Ki-Seong Kim; Jean-Hee Maeng; Ok Choi; An-soo Lee; Jong-Yeol Park; Jeong-Ho Choi; Duck-Hwan Park

doi:10.22698/jales.20260019

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2026 Vol.38, Issue 3 Preview Page Next Page

Research Article

Disease and Pest Occurrence in Fields of the Gangwon State-bred Potato Cultivar ‘Pungnong’ and Comparison of Control Effects of Registered Chemicals against Common Scab

30 September 2026. pp. 278-288

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Abstract

The pests and diseases that might affect the new Gangwon State-bred potato cultivar ‘Pungnong’ remain unknown; thus, in this study, the major diseases and pests and the control efficacy of registered chemicals against potato common scab was evaluated in ‘Pungnong’ potato fields in Gangwon State were evaluated with the aim of gathering baseline data for the stable cultivation and expanded distribution of the variety. Pest and disease surveys were conducted at ‘Pungnong’ demonstration sites in Wonju and Samcheok in 2024, and in Yeongwol and Yanggu in 2025. The survey results showed the repeated detection of Potato virus Y (PVY) in both years, rendering it the most frequently observed viral disease during the survey period. The virus was primarily detected between the tuber formation and tuber enlargement stages, and exhibited a high diseased tuber rate in conjunction with aphid infestations in some plots. Various symptoms, including chlorosis, chlorotic spots, and leaf curling were observed, suggesting that symptom manifestation may vary depending on the PVY strain, time of infection, and growing conditions. Fungal diseases were also observed, with early blight detected in some fields in Yeongwol and Yanggu in 2025, suggesting the need for continuous monitoring of late-season leaf diseases, while in terms of pests, the chafer beetle Popillia flavosellata was found at the Yeongwol demonstration site in 2025, indicating the need for further surveys to clarify its occurrence and damage patterns. A chemical control trial for potato common scab showed the best results for fluazinam granule treatment, with a disease severity of 35.6%, diseased tuber rate of 81.0%, total tuber yield of 4,988.3 kg/10 a, and marketable tuber rate of 82.0%. However, the high diseased tuber rate under treatment indicates that chemical treatment alone is insufficient to completely suppress the occurrence of common scab. The results of the study suggest that continuous monitoring of PVY and early blight is necessary in the ‘Pungnong’ fields, and that fluazinam granules should be used as part of an integrated disease management system combined with healthy seed tubers, soil moisture and pH management, and crop rotation.

Keywords

Fluazinam

Potato common scab

Potato virus Y

Pungnong

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Information

Publisher :Agriculture and Life Sciences Research Institute, Kangwon National University
Publisher(Ko) :None
Journal Title :Journal of Agricultural, Life and Environmental Sciences
Volume : 38
No :3
Pages :278-288
Received Date : 2026-07-29
Revised Date : 2026-08-05
Accepted Date : 2026-08-06
DOI :https://doi.org/10.22698/jales.20260019

Journal of Agricultural, Life and Environmental Sciences ISSN:2233-8322(Print) 2508-870X(Online)

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