. Fig. 85. — Uromyces coh/iui. i, portion of a diseased Colchicum leaf; 2, teleutospores, one of vvhicli has germinated and produced a promycelium bearing three secondary spores. Fig. i reduced, Fig. 2 mag. dark brown, apex much thickened, with a small, hyaline, wart- like papilla, 26-35 X 20-26 /x. If the disease appears early, spray with Bordeaux mixture ; when the pods are formed, use permanganate of potash. Broad bean rust {Uromyces fabae, De Bary) is a parasite very common on the leaves and stems of broad beans, peas, also on various wild leguminous plants, vetches, etc. The aecidium stag
. Fig. 85. — Uromyces coh/iui. i, portion of a diseased Colchicum leaf; 2, teleutospores, one of vvhicli has germinated and produced a promycelium bearing three secondary spores. Fig. i reduced, Fig. 2 mag. dark brown, apex much thickened, with a small, hyaline, wart- like papilla, 26-35 X 20-26 /x. If the disease appears early, spray with Bordeaux mixture ; when the pods are formed, use permanganate of potash. Broad bean rust {Uromyces fabae, De Bary) is a parasite very common on the leaves and stems of broad beans, peas, also on various wild leguminous plants, vetches, etc. The aecidium stage appears in the spring; the cluster-cups are grouped on conspicuous, thickened, whitish spots on the stem and leaves. The uredo stage follows as minute brown pustules, usually scattered thickly over the under surface of
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Keywords: ., bookpublishernewyorkmacmillan, booksubjectplantdis, bookyear1910
