. Fig. 26.—Plasmopara viticola. i, under surface of a vine leaf showing white patches of mildew ; 2, group of conidiospores bearing numerous conidia ; 3, three conidia more highly mag.; 4, conidia containing zoospores, in b, two zoospores have escaped from the conidium ; 5, mature oospore or nsting-spore ; 6, an oospore germinating and producing a conidiopiiore (after ) ; 7, autumnal form of conidiophore bearing a few large conidia (after ). Fig. i reduced, remainder highly mag. Oospores are produced in abundance in the dying portions of the plant. When a plant is attacked,
. Fig. 26.—Plasmopara viticola. i, under surface of a vine leaf showing white patches of mildew ; 2, group of conidiospores bearing numerous conidia ; 3, three conidia more highly mag.; 4, conidia containing zoospores, in b, two zoospores have escaped from the conidium ; 5, mature oospore or nsting-spore ; 6, an oospore germinating and producing a conidiopiiore (after ) ; 7, autumnal form of conidiophore bearing a few large conidia (after ). Fig. i reduced, remainder highly mag. Oospores are produced in abundance in the dying portions of the plant. When a plant is attacked, the fruit, even if not directly infected, suffers in consequence, and rarely matures, owing to
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Photo credit: © The Bookworm Collection / Alamy / Afripics
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Keywords: ., bookpublishernewyorkmacmillan, booksubjectplantdis, bookyear1910
