Yellow Blotch of Pleurotus ostreatus


Yellow blotch disease of the oyster mushroom (Pleurotus ostreatus) was first observed in a commercial mushroom farm in California in 1983. The disease, caused by Pseudomonas agarici, is characterized by primordia, with yellow droplets on their surface, which become stunted, yellow to orange, and deformed as they mature.

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