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 |
Powdery mildew caused by Golovinomyces cichoracearum (DC.) V.P. Heluta (formerly Erysiphe cichoracearum) is a common foliar disease on senescing leaves of cultivated sunflower in warmer regions of the world. In India, the powdery mildew disease is becoming major constraint in cultivation of sunflower crop especially during post rainy season. Screening of the sunflower germplasm lines against the disease would be of a great help to identify the resistance source. However, the development of resistant cultivars becomes very important if the crop is to expand into warmer regions where the disease may cause economic losses. Fifty six sunflower hybrids along with one susceptible check Morden were screened under artificial greenhouse conditions during the rabi season of 2013-14 by spraying spore suspension culture at 30 and 45 days after sowing. None of the hybrids screened were immune. However, 31 hybrids were found moderately resistant with less than 25% PDI while 25 hybrids registered susceptible reaction. The rate of apparent infection (r) in hybrids revealed a wide variation among the different hybrids at different intervals. The DMRT (Duncan’s multiple Range Test) ranks were assigned to each genotypes based on ‘r’ value. The DMRT ranking categorized 57 sunflower genotypes into seven groups.
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