Abstract

Seventeen species belonging to five genera of zoosporic fungi were isolated from dise- ased seads, seedling roots and soils of wheat from different sites of Kumaun Himalaya. A maximum number of species was recorded from Zone A (350-600 m) and minimum from zone C (1200-1800 m). Achlya diffusa, Harvey ex Johnson, A. flagellata, Coker, Py- thium echinulatum Matthews, P. rostratum Butler. P. spinosum Sawada and P. ultimum Trow were occured as parasites of wheat. In inoculation experiments, A. flagellata and P. ultimum appeared as highly pathogenic caused rotting of seeds and seedling roots in great extent. A. diffusa and P. epinosum also caused considerable loss, while P. echi- nulatum and P. rostratum were mild pathogenic to wheat.

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