Abstract            Volume:4  Issue-10  Year-2016         Original Research Articles

Online ISSN : 2347 - 3215 Issues : 12 per year Publisher : Excellent Publishers Email : editorijcret@gmail.com

Niger is commonly called “birdseed”. It is important minor, edible, traditional oil seed crop in India. The crop is affected by number of diseases. Among them leaf blight and leaf spot caused by Alternaria  porri, the disease reduces the seed germination and yield up to 40-40%. The present study concentrated on detection and seed transmission of A. porri  in Niger seeds during kharif seasons-2010-2011. A total of 132 seed samples were collected from farmers, retail shops, fields and APMC markets and were subjected to SBM, PDA, Water agar and 2,4,D  methods. Five seed samples showing higher incidence of A. porri and other fungi in SBM were selected for  seed to seedling transmission of the pathogen.  The results revealed that the kharif - 2010 shows A. porri (33-52%) in the SBM method, PDA (11-25%), Water agar (6-15%) and 2,4-D (9-18%) respectively. The collected seed samples, fields and farmer’s samples show a higher incidence of A. porri  and other fungi. The SBM method is more superior for isolating the A. porri  and other fungi than PDA, water agar and 2,4, D methods. The transmission of A. porri  was (12.6%) in kharif 2010. In kharif 2011, the transmission was (23.2%) in all the five seed samples. The present study reveals that the disease transmission is more during kharif-2011 season than 2010. The A. porri  is a causal agent of leaf spot and leaf blight disease of Niger crop.

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