Physiological race identification and pathogenicity analysis of Iranian Fusarium oxysporum f. sp. melonis-melon pathotype isolates

N. Shafagh, M. Nasr-Esfahani, N. Atabaki
Fusarium wilt of melon, caused by Fusarium oxysporum f. sp. melonis (Fom) (Nectriaceae), is one of the most important diseases, causing tremendous losses in melon, Cucumis melo L. (Cucurbitaceae), growing areas in Iran. Searching for resistant sources requires detailed knowledge of the pathogen. Thus, race identification of the pathogen was carried out on various isolates collected throughout the critical melon growing areas, using differential hosts. The results indicated that 80% of the isolates are pathogenic to the melon crops. Tests on seedlings of melon, cucumber, watermelon, and pea showed typical symptoms of the disease on melon plants. For the race identification tests, differential hosts were used, out of which race one was approved. In the race determination test, all isolates were virulent on susceptible 'Charentais T' that does not have any resistance gene and on 'Charentais Fom1' that has the Fom1 resistance gene.
Shafagh, N., Nasr-Esfahani, M. and Atabaki, N. (2021). Physiological race identification and pathogenicity analysis of Iranian Fusarium oxysporum f. sp. melonis-melon pathotype isolates. Acta Hortic. 1326, 279-286
DOI: 10.17660/ActaHortic.2021.1326.37
https://doi.org/10.17660/ActaHortic.2021.1326.37
melon, Cucurbitaceae, Fusarium wilt, forma specialis, Nectriaceae, races
English

Acta Horticulturae