. Fig. 130. — Vermiculariacircinans. i, onion attacked by fungus; 2, one of the black tufts of the fungus; 3. portion of a tuft showing the conidia borne at the apex of slender conidiophores, also the long black spines. I"it;s. 2 and 3 liighly mag. French potato scab.—Dr. Ducomet has described a disease of potatoes and tomatoes which when recurring on the tubers would come under our conception of scab, but which he terms 'dartrose.' The fungus causing the injury is VermUularia varians (Ducomet), The disease, although present, is not

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Keywords: ., bookpublishernewyorkmacmillan, booksubjectplantdis, bookyear1910