International Journal of Chemical Studies
Vol. 6, Issue 2 (2018)
Variability in Fusarium oxysporum f.sp. lycopersici causing wilt of tomato
Author(s): T Sivakumar, P Balabaskar and K Sanjeevkumar
Abstract: Variability among twenty isolates of Fusarium oxysporum f.sp. lucopersici (FOL) collected from different tomato growing regions of Tamilnadu was studied in respect of cultural morphological and pathogenic characters. Isolates FOL 4 and FOL9 recorded the maximum colony diameter. Considerable variations were observed with all the culture characteristics of Fusarium spp. tested. Isolates FOL 2,3,4,6,7,8,9,11,12, 18 and 19 produced abundant sporulation while remaining isolates produced good sporulation. The isolates FOL 4 recorded the maximum mycelia dry weight and sporulation. The least mycelia growth was produced by FOL 18 and minimum sporulation was recorded by isolates FOL 14. All the isolates showed significant variation in size of micro conidia, macro conidia and chlamydospores. With regard to pathogenic variability the isolates of FOL viz., 2,4,6,9,11,12,18 and 19 were proved to be highly virulent when tested with susceptible varieties PKM1 and CO1. The rest of the isolates were moderately virulent when tested with both the susceptible varieties.
Pages: 3655-3659 | 401 Views 18 Downloads
How to cite this article:
T Sivakumar, P Balabaskar, K Sanjeevkumar. Variability in Fusarium oxysporum f.sp. lycopersici causing wilt of tomato. Int J Chem Stud 2018;6(2):3655-3659.