Prevalence and pathogenic diversity in pearl millet downy mildew pathogen populations in Maharashtra, India

Sharma, R and Gate, V L and Kishore Babu, B and Rao, V P and Ghughe, S S (2012) Prevalence and pathogenic diversity in pearl millet downy mildew pathogen populations in Maharashtra, India. Indian Journal of Plant Protection, 40 (4). pp. 306-311. ISSN 0253-4355

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Abstract

Pearl millet fields were surveyed in Maharashtra, India during the rainy seasons of 2009 and 2010 to monitor onfarm downy mildew (DM) incidence and assess the pathogenic diversity among native populations of Sclerospora graminicola. Of the 131 fields surveyed in seven districts in Maharashtra, DM was observed in 72 fields in the range of 1–90%. DM was quite severe in Ahmednagar, Jalgaon, Aurangabad and Jalna districts with mean disease incidence of 56, 40, 35 and 32, respectively. Severe DM was observed on Pioneer 86M32, B 2301, GK 419, Tulsi, 535, 452 and several hybrids of unknown identity; whereas hybrids MRB 204, Nirmal 40, Sathya, Super 515, Super Boss, Tulja, XL 51, Great 555, Nuzvid 2301, Paras 51 and Sandeep were free from DM. Twenty six S. graminicola isolates collected during 2009–10 from Maharashtra were evaluated for pathogenic diversity on seven pearl millet host differential lines along with three isolates of S. graminicola collected earlier from the same region. Mean disease incidence on host differentials varied from 5 to 80%. S. graminicola isolates Sg 542, Sg 543, Sg 544, Sg 545, Sg 547, Sg 549, Sg 550, Sg 552, Sg 553, Sg 554 and Sg 555 showed > 50% mean DM incidence across host differentials. Highly virulent isolate Sg 542 collected from Deogaon, Aurangabad has been selected for the greenhouse screening of pearl millet lines being developed for Maharashtra

Item Type: Article
Divisions: UNSPECIFIED
CRPS: UNSPECIFIED
Uncontrolled Keywords: Sclerospora graminicola, downy mildew incidence, pathogenic diversity
Subjects: Mandate crops > Millets
Depositing User: Ms K Syamalamba
Date Deposited: 28 Jun 2013 08:15
Last Modified: 28 Jun 2013 08:15
URI: http://oar.icrisat.org/id/eprint/6890
Official URL: http://indianjournals.com/ijor.aspx?target=ijor:ij...
Projects: UNSPECIFIED
Funders: UNSPECIFIED
Acknowledgement: UNSPECIFIED
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