First Report of Alternaria alternata Causing Leaf Spot on Rumex dentatus in Pakistan.

Leaf spot disease was found on Rumex dentatus L., an annual as well as biennial weed of family polygonaceae.in Punjab, Pakistan during the surveys of wheat fields from1999-2002. Symptoms appear as small circular spots, light brown in colour, which later become irregular and dark brown, while others remain circular with concentric rings or zones. The causal fungus was morphologically identified as Alternaria alternata (Fr.) Keissler. This is the first record of A. alternata on R.dentatus.The American Phytopathological Societ