. Fig. 146.—I, Cercospora melonis, a leaf of cucumber showing early stage ot disease ; 2, sporophores emerging from a stoma, and bearing spores, mag. ; 3, spore, highly mag. it suddenly appeared in the houses of a grower located at some distance from the nearest known infected area. The explanation was as follows. This grower had sent a consign- ment of cucumbers to Covent Garden, and by some mistake his own empty packing-cases or ' flats' were not returned, but instead, those belonging to another grower whose plants were diseased. Spores of the fungus had been conveyed from one district to an
. Fig. 146.—I, Cercospora melonis, a leaf of cucumber showing early stage ot disease ; 2, sporophores emerging from a stoma, and bearing spores, mag. ; 3, spore, highly mag. it suddenly appeared in the houses of a grower located at some distance from the nearest known infected area. The explanation was as follows. This grower had sent a consign- ment of cucumbers to Covent Garden, and by some mistake his own empty packing-cases or ' flats' were not returned, but instead, those belonging to another grower whose plants were diseased. Spores of the fungus had been conveyed from one district to another, adhering to the empty cases. I obtained a case that had contained diseased plants, and
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Keywords: ., bookpublishernewyorkmacmillan, booksubjectplantdis, bookyear1910
