Division of Nematology, Indian Agricultural Research Institute, New Delhi-110012.
* Part of an M. Sc. thesis submitted by the senior author, to P.G. School, IARI, New Delhi.
Decreased photosynthetic efficiency of wheat in terms of Absolute Growth Rate (AGR). Relative Growth Rate (RGR) and Net Assimilation Rate (NAR) due to Heterodera alienae infection was recorded. Chlorophyll and net photosynthetic rate decreased with increasing levels of nematode inoculum. Nitrogen and potash contents were decreased significantly in straw, respectively, at 20 and 10 eggs and larvae/cm3 soil. Phosphorus was significantly decreased in grain as well as straw, respectively, at 15 and 20 eggs and larvae/cm3 soil. A negative correlation was recorded between inoculum level of H. avenae and chlorophyll. photosynthesis and mineral contents of wheat.
Chlorophyll, photosynthesis, mineral contents, Heterodera avenae wheat
