Parthenium hysterophorus L., when fed to buffalo bull calves and cross bred bull calves resulted in acute toxicity leading to death. The former animals developed severe dermatitis. Autopsy revealed ulceration of alimentary tract. Extensive pathological changes were noticed in liver, kidney and skin.
Acknowledgments. We thank, Dr Satish Dhawan and Mr M. A. Sethu Rao for their keen interest. The help rendered by Bangalore City Corporation authorities in the supply of Parthenium is gratefully acknowledged.