Identification of Fusarium Basal Rot Pathogens of Onion and Evaluation of Fungicides against the Pathogens
10.1080/12298093.2023.2243759
- Author:
Jong-Hwan SHIN
1
;
Ha-Kyoung LEE
;
Chang-Gi BACK
;
Soo-hyun KANG
;
Ji-won HAN
;
Seong-Chan LEE
;
You-Kyoung HAN
Author Information
1. Horticultural and Herbal Crop Environment Division, National Institute of Horticultural & Herbal Science, Rural Development Administration, Wanju, Republic of Korea
- Publication Type:RESEARCH NOTE
- From:Mycobiology
2023;51(4):264-272
- CountryRepublic of Korea
- Language:English
-
Abstract:
Onion (Allium cepa L.) is an economically important vegetable crop worldwide. However, various fungal diseases, including Fusarium basal rot (FBR), neck rot, and white rot, reduce onion production or bulb storage life. FBR caused by Fusarium species is among the most destructive onion diseases. In this study, we identified Fusarium species associated with FBR in Jeolla and Gyeongsang Provinces in South Korea and evaluated fungicides against the pathogens. Our morphological and molecular analyses showed that FBR in onions is associated with Fusarium commune,Fusarium oxysporum , and Fusarium proliferatum. We selected seven fungicides (fludioxonil, hexaconazole, mandestrobin, penthiopyrad, prochlorazmanganese, pydiflumetofen, and tebuconazole) and evaluated their inhibitory effects on mycelial growth of the pathogens at three different concentrations (0.01, 0.1, and 1 mg/mL). We found that prochloraz-manganese was highly effective, inhibiting 100% of the mycelial growth of the pathogens at all concentrations, followed by tebuconazole. Fludioxonil showed < 50% inhibition at 1 mg/mL for the tested isolates.cc
