Author(s): Kulchander, Dr. SS Sharma, Kalpana Yadav, Kiran Dudi and Poonam Yadav

Abstract: Fusarium is considered as a devastating fungal menace of the most prevalent fungus on maize, particularly in USA, Europe, Africa, Asia and Australia. A experiment was conducted with ten isolates of Fusarium spp. (F. proliferatum (4 isolates), F. verticillioides (5 isolates), and F. pallidoroseum (1 isolates) were collected from different parts of Rajasthan from rotted maize stalks and identified by ITCC, IARI (New Delhi, India). The maximum colony diameter (90mm) were observed in isolate Fv-01 (F. verticillioides) whereas minimum colony diameter (54.70mm) was observed in isolate Fv-09 (F. proliferatum). Isolates varied among themselves with respect to pigmentation by white 3, pink 2, violet 2, Pale Yellow, light vane light brown and brown 1. Margin and topography of the isolates varied from circular 6, semi-circular 3, waivy 1 and flat 5, medium raised 3 and raised 2, respectively. The maximum length and width of macro conidia was recorded in the isolate Fv-02 (F. verticillioides) which measured i.e. 40.24- 6.60 μm while minimum in Fv-09 (F. proliferatum) of 17.57- 1.80 μm. On the basis of cultural and morphological characters of all the ten isolates showed variability.

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