Morphological, Cultural and Pathogenic Variation in Races and Variant of F. oxysporum f. sp. Ciceris from Seven Locations of Central Zone of India

Publication Date : 11/01/2017


Author(s) :

Dr. Minakshi Patil , Dr. Om Gupta , Dr. P. K. Rathod.


Volume/Issue :
Volume 3
,
Issue 1
(01 - 2017)



Abstract :

Chickpea (Cicerarietinum L.) is the most important pulse crop among the major Rabi pulses. Fusarium wilt caused by Fusarium oxysporum f. sp. Ciceris is considered to be the most devastating disease throughout the country. Variability among the seven isolates of FOC collected from different locations central zone of India was studied in respect of cultural, morphological characters and pathogenicity. Pathogenic variability has been established by inoculating ten days old seedlings of JG 62 and JG 315 with all the isolates individually. JG 62 exhibited susceptible reaction to all the individual isolates, however, days to disease initiation and 100 percent mortality due to wilt varied within the isolates, JG 315 exhibited clear-cut variation in virulence among the isolates. Out of seven isolates I-19 and I-28 showed resistant reaction, I-20, I-13 and I-1 showed moderately resistant whereas, I-4 and I-80 showed susceptible reaction. Cultural studies of all isolates of F. oxysporum f. sp. Ciceris resulted that isolates differ in the type of mycelial growth pattern, pigmentation, rate of growth and sporulation on both Potato Dextrose Agar and Potato Dextrose Broth medium being favourable for luxuriant growth for all the isolates. Growth characters among the isolates varied as fluffy, partial fluffy, cottony growth, partial submerged and submerged. Morphological studies of different isolates of F.oxysporum f. sp. Ciceris concluded variation in size and septation. Macro conidia varied from 1.7 to 9.1x105 on 5th and on 7th DAI whereas, micro conidia possessed 2.0 to 9.1x105 after 5th and 7th DAI. (Keywords: Fusarium, oxysporium, isolates, morphology, cultural, macroconidia and micronodia)


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