Disease-associated mushroom virus

The characteristic symptoms of 'La France' disease of the cultivated mushroom are locally dying mycelium and, if formed at all, fruit bodies with elongated stipes and small, early maturing caps or fruit bodies with thickened, barrel-shaped stipes. The disease is highly infectious in the sense that, when initiated, it is rapidly transmitted throughout shelves of mushrooms and can infect entire mushroom farms, resulting in complete loss of crop. Rapid spread of the disease is due to the fact that spores from diseased mushrooms (that can survive long periods without germination) transmit the disease by anastomosis with healthy mycelium. Sonnenberg and Van Griensven (1991) have shown that during this anastomosis only dsRNA and no nuclear genes are transmitted.

Zie: Summary and general discussion

Summary and general discussion

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