Host plant resistance to grain mould in germplasm accessions of pearl millet (Pennisetum glaucum [L.] R. Br.)

Navi, S S and Tonapi, V A and Varanavasiappan, S and Ravinder Reddy, Ch (2006) Host plant resistance to grain mould in germplasm accessions of pearl millet (Pennisetum glaucum [L.] R. Br.). Archives of Phytopathology and Plant Protection, 39 (6). pp. 465-477. ISSN 0323-5408

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The paucity of information on the moulds in Indian pearl millet (Pennisetum glaucum) led to the studies that were conducted at ICRISAT, India to evaluate (a) 447 germplasm accessions of 32 countries for mould reaction in rainy season, (b) threshed grain mould rating (TGMS) and mycoflora on grains of each accession, and (c) mould scores in field and in vitro. Post physiological maturity evaluation showed that 16% of the accessions secured a mould rating of 2. In TGMS, 18% were mould free and 57% secured a rating of 2 on a 1 – 9 scale. Assessment of twenty representative accessions in vitro against individual and mixed conidial suspensions (1610(6) conidia ml(71)) of Fusarium moniliforme, F. pallidoroseum and Curvularia pennisetti indicated significant correlation (r¼0.97) between the overall field and in vitro scores of mixed spores inoculations. The mycoflora for TGMS in blotter test revealed that Fusarium moniliforme, F. pallidoroseum, Curvularia pennisetti, Helminthosporium spp., Alternaria spp. and Colletotrichum spp. to be the major fungi affecting pearl millet grain. It is advisable to harvest panicles at the physiological maturity stage to obtain better quality grains. A strong negative correlation between TGMS and % GS (r¼0.4601) and positive correlation between TGMS and % UGS (r¼0.4654) indicated that, the lesser the threshed grain mould rating higher the % seed germination.

Item Type: Article
Subjects: Mandate crops > Millets
Depositing User: Library ICRISAT
Date Deposited: 27 Oct 2011 08:20
Last Modified: 25 Nov 2011 08:57
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Acknowledgement: UNSPECIFIED
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