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International Journal of Current Microbiology and Applied Sciences (IJCMAS)
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National Academy of Agricultural Sciences (NAAS)
NAAS Score: *5.38 (2019)
[Effective from January 1, 2019]
For more details click here

ICV 2017: 100.00
Index Copernicus ICI Journals Master List 2017 - IJCMAS--ICV 2017: 100.00
For more details click here

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PRINT ISSN : 2319-7692
Online ISSN : 2319-7706
Issues : 12 per year
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Editor-in-chief: Dr.M.Prakash
Index Copernicus ICV 2017: 100.00
NAAS RATING 2018: 5.38

Int.J.Curr.Microbiol.App.Sci.2019.8(11): 302-313
DOI: https://doi.org/10.20546/ijcmas.2019.811.038


Cultural, Morphological and Pathogenic Variability of Exserohilum turcicum causing Turcicum Leaf Blight in Maize
Geeta1*, D.S. Aswathanarayana1, M.K. Naik2, Mallikarjun Kenganal1 and Prakash H. Kuchanur3
1Department of Plant Pathology, College of Agriculture, University of Agricultural Sciences, Raichur-584104, India
2Department of Plant Pathology, University of Agricultural and Horticultural Sciences, Shivamogga, India
3Department of Genetics and Plant Breeding, College of Agriculture, Bheemarayanagudi, India
*Corresponding author
Abstract:

Turcicum leaf blight of maize caused by Exserohilum turcicum is an economically important foliar disease, the findings of the study reveals that, among the 32 isolates, tested for mycelia growth on PDA, Aedigudda (Et12), Dibbadahalli (Et14), Hulihyder (Et19), Kanakagiri (Et28) and Raichur (Et32) isolate showed an excellent mean radial growth (90.00 mm) and least mean radial growth was obtained in Et9 (Choornoor) isolate with mycelia growth of 69.00 mm. Maximum number of E. turcicum isolates were having the septa of 3-8 and 3-9 with protruding hilum. Interestingly an isolate Et16 and Et28 from Hadagali and Kanakagiri respectively having 3-15 septa. Maximum size of conidia was observed in Et16 of Hadagali (120.78 µm × 29.15 µm) followed by Et28 of Kanakagiri (116.62 µm × 24.99 µm). In pathogen variability studies, CM-202 and MI-39 inbred lines showed significantly higher mean lesion sizes of 1.31 cm2 and 1.29 cm2 for most of the isolates respectively. Smaller lesion size of 0.26 cm2 was recorded in HS-2. Across the maize inbred lines E. turcicum, isolates from Farathabad, Bheemarayanagudi and Mataladinni produced higher mean lesion size of 1.10, 1.00 and 1.00 cm2 respectively, where as small lesion size was noticed in Kushtagi (0.24 cm2) and Kottur (0.25 cm2) isolates. CM-202 and MI-39 inbred lines showed susceptible to highly susceptible reaction to majority of the isolates (3 to 5 reaction). The inbred lines 9202B, 9208B showed highly resistant to moderately resistant reaction (1-3) whereas CI-4 and HS-2 showed highly resistant to resistant reaction.


Keywords: Maize, Exserohilum turcicum, Cultural variability, Morphological variability
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How to cite this article:

Geeta, D.S. Aswathanarayana, M.K. Naik, Mallikarjun Kenganal and Prakash H. Kuchanur. 2019. Cultural, Morphological and Pathogenic Variability of Exserohilum turcicum causing Turcicum Leaf Blight in Maize.Int.J.Curr.Microbiol.App.Sci. 8(11): 302-313. doi: https://doi.org/10.20546/ijcmas.2019.811.038