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Indian Journal of Nematology
Year : 2010, Volume : 40, Issue : 2
First page : ( 155) Last page : ( 161)
Print ISSN : 0303-6960. Online ISSN : 0974-4444.

Infestation of Root-Knot Nematode, Meloidogyne graminicola in Wheat

Singh S.K.*, Sharma Lalan, Singh K.P.**

*Centre of Advanced Studies in Plant Pathology, G.B. Pant University of Agriculture and Technology, Pantnagar – 263 145, India

**Department of Mycology and Plant Pathology, Institute of Agricultural Sciences, Banaras Hindu University, Varanasi-221 005, U.P., India e-mail: singh_sk30@yahoomail.com

Abstract

A survey was conducted for analysis of losses by rice root-knot nematode (Meloidogyne graminicola) in wheat were assess under 30 plots during 2004–05 and 2005–06 of Agriculture Research Farm, Institute of Agricultural Sciences, Banaras Hindu Universtiy, Varanasi. On the basis of observations, it was found that out of 30, 18 wheat plots recorded root-knot infection, during 2004–05, while during 2005–06, out of 30, only 6 wheat plots recorded root-knot infection. Thus only fields recorded 20% infection during 2005–06. The field infection of wheat by M. graminicola of seedling stage reduced height of plants by 50% in severely infected fields during 2004–2005. However, during 2005–2006 reduction in height of the plants was much less due to mild infection. During 2004–05, particularly in later sown fields, the number and length of internodes were greatly reduced. The flag leaves of severely infected plants at maturity stage extended beyond the ear head whereas in healthy plants flag leaves and ear head terminated at equal level. In general, the number of grains per ear head was reduced in the infected plants which were related to number of galls per plant.

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Keywords

Meloidogyne graminicola, rice root-knot nematode, yield losses, wheat, Phalaris minorCyperus rotundusCynodon dactylon.

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