Vol. 7, Issue 5 (2019)
Morphological, cultural and pathogenic variability of the different isolates of Fusarium oxysporum f. sp. radicis cucumerinum causing root and stem rot of cucumber
Author(s): Kalpana Yadav, NL Meena, Kulchander and Nitisha Gahlot
Abstract: An experiment was conducted to study the variability using 5 isolates of Fusarium oxysporum f.sp. radicis cucumerinum causing Root and Stem Rot of cucumber collected from different cucumber growing areas of nearby Udaipur region. Studies were made on cultural, morphological, and pathogenic variation like mycelial colour, mycelial growth, macro and micro conidial size and formation of chlamydospores, and disease incidence of several isolates on seedling stage of cucumber. The isolates produced moderate, profuse fluffy, white colour, thin flat to slight fluffy growth and submerged growth had yellow and light pink pigmentation. The size of macroconidia ranged from 25.0-35.0× 2.7-4.8 µm with 1–4 septa in different isolates. The size of microconidia varied from 3.0-7.4× 2.3-2.6 µm with 0–1 septa in different isolates. All isolates of Fusarium sp. were inoculated on cucumber for their pathogenic variability in Cage house by soil inoculation technique. Isolate FORC-5 and FORC-3 were highly virulent and causing more than 60% disease. FORC- 1 exhibited moderate virulence and FORC-2 was least virulent pathogen with 17.50 per cent disease incidence recorded.
Pages: 1568-1572 | 205 Views 36 Downloads
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How to cite this article:
Kalpana Yadav, NL Meena, Kulchander, Nitisha Gahlot. Morphological, cultural and pathogenic variability of the different isolates of Fusarium oxysporum f. sp. radicis cucumerinum causing root and stem rot of cucumber. Int J Chem Stud 2019;7(5):1568-1572.
