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Evaluation of twenty carnation genotypes for their susceptibility to two isolates of Fusarium oxysporum f. sp. dianthi revealed that, the genotypes Loris and Malaga recorded the least number of days taken for first symptom appearance for Pune (38.5 days) and Solan (41 days) isolates respectively, whereas the highest number of days taken for first symptom appearance was recorded in the genotype Praga (57 and 58.5 days) in both Pune and Solan isolates respectively. In the presence of Pune isolate, the highest per cent disease incidence was recorded in the genotype Hunza (100 per cent), whereas, the lowest per cent disease incidence was recorded in Praga (16.66 per cent). On the other hand, for Solan isolate, Big Mama and Dark Dona recorded the highest per cent disease incidence (100 per cent) and Praga recorded the lowest per cent disease incidence (24.99 per cent). Disease severity was recorded to be highest in the genotype Loris (65.95 %) and Malaga (68.96 %) in case of Pune and Solan isolates respectively, the genotype Praga recorded the lowest disease severity for both isolates viz., Pune (8.98 %) and Solan (7.77 %).
Keywords: Carnation, Fusarium oxysporum f. sp. dianthi, isolates, evaluation, disease severity.