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 |
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.
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