Association of Trechispora alnicola with yellow ring disease of Poa pratensis

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Abstract
Trechispora alnicola (Bourd. & Galz.) Liberia was associated with Poa pratensis L. roots and in the thatch layer of blue-grass sod. These plants had yellowed leaves. On thatch and culture medium, the fungus isolated from diseased plants produced hyaline mycelium typical of T. alnicola, and crystalline material. Conidia produced on thatch or on culture medium germinated by the production of a single germ tube. Basidia from basidiomata produced in nature were arranged in an effused manner; basidiospores were echinulate. This is the first report of T. alnicola associated with a member of the Graminae.

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