Ophiostoma
Ophiostoma (order Ophiostomatales) A genus of fungi (formerly Ceratocystis) which includes a number of important plant pathogens O. ulmi is the causal agent of Dutch elm disease. Other species cause disease in oaks (oak wilt), sweet potatoes, coffee, rubber, and sugar-cane, and some can cause staining of timber.
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Ophiostoma