National Academy of Agricultural Sciences (NAAS)
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PRINT ISSN : 2319-7692
Online ISSN : 2319-7706 Issues : 12 per year Publisher : Excellent Publishers Email : editorijcmas@gmail.com / submit@ijcmas.com Editor-in-chief: Dr.M.Prakash Index Copernicus ICV 2018: 95.39 NAAS RATING 2020: 5.38 |
Chickpea wilt caused by F. oxysporum f. sp. ciceri is one of the most important seed and soil-borne disease in India. The study on association of the pathogen with chickpea seeds showed that the viable mycelium fragments, micro and macro-conidia of the pathogen were present on the seed surface of all susceptible and two resistant varieties/ germplasms in seed washing test. The pathogen was recovered from the untreated and sodium hypochlorite treated seeds of all susceptible varieties/ germplasms in the range of 10.67–18.67 and 5.33–11.33 per cent, respectively in standard blotter method and 8.67–17.00 and 5.00–10.67 per cent, respectively in agar plate method, whereas the seeds of resistant varieties RSG-895 and Phule G-5 also carried the pathogen in untreated and sodium hypochlorite treated seeds. The recovery of pathogen was ranged from 10.0–20.0 per cent from the seed coat, 2.0–8.0 per cent from cotyledons and 2.0–6.0 per cent from embryonal axis of the susceptible varieties/germplasms. Whereas resistant variety RSG-895 carried the pathogen to an extent of 4.0 per cent from seed coat only. The pre-emergence infection of the pathogen was recorded by 6.0–14.0 per cent in different susceptible varieties/ germplasms and 4.0 per cent in resistant varieties during seedling symptom test. The pathogen was survived for 10–15 months in susceptible and 3–5 months in resistant varieties/ germplasms seeds. The pre and post-emergence losses due to the pathogen were ranged from 7.0–12.0 per cent and 6.0–10.0 per cent, respectively in susceptible varieties/ germplasms under field conditions in poly bags. The typical wilt symptoms have developed after 18–22 days of sowing and the average seed infection and seed transmission ratio was 6.08:1 under field conditions in susceptible varieties/ germplasms.
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