Wilt incidence and cultural variability of Fusarium oxysporum f.sp. udum collected from different districts of Uttar Pradesh

Pigeonpea (Cajanus cajan) L. Millsp. is an important legume crop widely used as food grain as it is rich source of protein, carbohydrate, essential amino acids, minerals and fibres. India is reknowned as a major pigeonpea producer country all over the world. Pigeonpea is susceptible to a number of pathogens, among which Fusarium oxysporum f.sp. udum is considered as the most important fungal pathogen causing considerable economic loss in India and all over the world. Among different states in India, Uttar Pradesh is the major pigeonpea growing state having most of the wilt susceptible pigeonpea growing areas causing considerable yield losses. In the present study, collection of diseased samples from wilt affected areas of different districts, isolation of test fungi, test of pathogenicity in pots under wirenet house condition was conducted. Further test of wilt incidence of the selected strains of Fusarum oxysporum f.sp. udum through root dip method and soil inoculation method was undertaken in earthen pots under wirenet house to make a precise comparison between the two methods. Cultural variabilities like radial growth, growth rate and mycelia dry weight among the selected isolates were studied under laboratory conditions.

Isolation of Fusarium udum from the diseased samples collected from different districts of Uttar Pradesh.

Test of pathogenicity of the isolated strains of F. udum.

Study of disease incidence of selected isolates by root dip and soil-inoculation methods.