Effect of head smut on morphology and growth parameters of kodo millet (Paspalum scrobiculatum L.) cultivars

Authors

  • A.K. JAIN*, ASHISH KUMAR, JAGDISH NEMADE and S.K. TRIPATHI

Keywords:

Kodo millet, head smut, morphological parameters, growth parameters

Abstract

Head smut of Kodo millet (Paspalum scrobiculatum L.) caused by Sorosporium paspali-thunbergii (Henn.) Ito (Sporisorium paspali-thunbergii (Henn) Vanky) is an externally seed borne disease and cause substantial economic yield loss particularly in susceptible cultivars. Phenotypic variations in the host plant due to incidence of smut causing pathogens have been reported in different crops. In the present investigation, effect of head smut incidence on morphological and growth parameters of 12 kodo millet cultivars possessing various degrees of resistance and susceptibility were studied. Significant variation in morphological traits was recorded indicating the existence of genetic variability in the present kodo millet cultivars. Reduction in plant height varied from 1.5 to 9.8% and tillers plant-1 varied from 0.0 to 37.2% was recorded. Significant reduction in leaf area index (LAI) ranging from 3.3 to 28.0% was recorded. Average crop growth rate (CGR) between 30-60 DAS in healthy and smut infected plants was more as compared to growth period between 60-90 days. Reduction in CGR between 30-60 days ranged 1.2 to 20.8% and 1.7 to 19.1% between 60-90 DAS. Susceptible cultivars expressed more reduction in CGR as compared to resistant cultivars. Percent reduction in absolute water content (AWC) due to smut infection ranged 0.23 to 9.42% and 0.45 to 12.79% at 30 and 60 DAS, respectively. Resistant cultivars exhibited higher AWC than the susceptible cultivars. The retarding effects in morphological traits and growth parameters in smut infected plants was more in susceptible to highly susceptible cultivars as compared to resistant cultivars and it may be due to pathogen induced imbalance in the physiology of host tissues during infection and successive growth.

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Issue

Vol. 69 No. 4s (2016): Indian Phytopathology : Special Issue

Section

Research Articles

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How to Cite

and S.K. TRIPATHI, A. J. A. K. J. N. (2016). Effect of head smut on morphology and growth parameters of kodo millet (Paspalum scrobiculatum L.) cultivars. Indian Phytopathology, 69(4s), 186-191. http://epubs.icar.org.in/ejournal/index.php/IPPJ/article/view/71275