查看更多>>摘要：Lentil (Lens culinaris M.) is a vital nutritional source of protein in several parts of the world including India. The crop is susceptible to wilt, a devastating soil-borne disease induced by the fungus Fusarium oxysporum f. sp. lentis. In sight of the potential threat Fusarium wilt can pose to lentils, these studies were measured essential, and consequently initiated for the assessment of the disease occurrence, characterization and variations in morphological, cultural and pathogenic behavior of collected isolates the pathogen. Understanding cultural, morphological and pathogenic variation of F. oxysporum isolates is of highest importance, which has not been formerly studied in Rajasthan. 30 locations of ten districts viz Bharatpur, Pratapgarth, Bhilwara, Kota, Bundi, Dholpur, Swaimadhopur, Baran, Jhalawar and Chittorgarth of Rajasthan state were surveyed during the crop season of continues two year (2016-2017 and 2017-2018). Wilt disease incidence in different districts varied from 9.05 to 39.40percent. Maximum per cent disease incidence 39.50 was recorded in Bundi district.In total, 10 isolates of pathogen(FOL) wererecovered. All collected isolates were showed variations in color of colony, morphology and pathogenic response. Four isolates FOL-01, 02, 05 and 08 were showed colony color is dull white and substrate color dark tan, FOL-03 and 06 showed pinkish colors and substrate color was pink, FOL-04, 07, 09 and 10 were milky white and substrate color was purple. In the morphological variations, large conidia (>15p.) were observed in F0L-03, 04, 07, 09 and 10, small conidia (< 15p.) were observed in F0L-01, 02, 05, 06 and 08. Pathogenic variation testingon susceptible cultivar L9-12, FOL-02 recorded the highest per cent mean wilt disease incidence (73.31) and minimum 20 days taken for disease development followed by F0L-08 with 71.66 per cent disease incidence and 23 days.
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