International Journal of Chemical Studies
Vol. 6, Issue 2 (2018)
Culture filtrate effect and pathogenic variability of isolates of Fusarium oxysporum on fenugreek
Author(s): Rani N and Yashoda R Hegde
Abstract: Fenugreek (Trigonella foenum graecum L.) is an important seed spice, originated in South-Eastern Europe belonging to the family Fabaceae. Although many diseases are reported in fenugreek, wilt caused by Fusarium oxysporum is becoming more severe in recent years. Maximum growth of F. oxysporum was attained on 14th day after incubation (393.33 mg) beyond which autolysis occurred. Among 20 isolates, Fo NES (89.50%) showed maximum per cent of seed germination and also root and shoot length which differed significantly with other isolates indicating low quantity of toxin production. Complete failure of seed germination was observed in isolates viz., Fo YAT, Fo GOV, Fo BAN, Fo GAN and Fo SOM with maximum toxin production. Higher seedling vigour index was noticed in Fo NES isolate (1337.91) followed by Fo NAR (1291.78). Whereas, the isolates like Fo YAT, Fo GOV, Fo BAN, Fo GAN and Fo SOM recorded zero vigour index, indicating high quantity of toxin production. With respect to pathogenic variability, cent per cent disease incidence was recorded in all isolates of F. oxysporum. Maximum degree of virulence index was recorded in Fo YAT (3.57) which took less number of days (28) for complete wilting of plant followed by Fo BAN and Fo SOM (3.13) required 32 days for wilting. However, Fo HEB and Fo NES was found to be less virulent with minimum virulence index of 1.67 and took maximum days (60) for complete wilting of plants.
Pages: 2463-2470 | 247 Views 9 Downloads
How to cite this article:
Rani N, Yashoda R Hegde. Culture filtrate effect and pathogenic variability of isolates of Fusarium oxysporum on fenugreek. Int J Chem Stud 2018;6(2):2463-2470.