. Fungous diseases of plants, with chapters on physiology, culture methods and technique . Fig. 53. Plasmopara on Grape, {d and r/after Farlow) n, mycelium; 3, mature conidiophore ; c and d, zoospore and oospore formation, respectively than two-thirds grown (see illustration facing page i). Upon [7//icordifolia the fungus may fruit so abundantly upon the young berriesas to completely envelop them in a downy mass of such circumstances the berry does not at that stage showevidences of decay, and it is only when the berries are older, andin other species nearly full grown, that
. Fungous diseases of plants, with chapters on physiology, culture methods and technique . Fig. 53. Plasmopara on Grape, {d and r/after Farlow) n, mycelium; 3, mature conidiophore ; c and d, zoospore and oospore formation, respectively than two-thirds grown (see illustration facing page i). Upon [7//icordifolia the fungus may fruit so abundantly upon the young berriesas to completely envelop them in a downy mass of such circumstances the berry does not at that stage showevidences of decay, and it is only when the berries are older, andin other species nearly full grown, that the fungus produces atrue decay. When the disease occurs upon the young fruits thefinancial losses may be severe. 15b FUNGOUS DISEASES OF PLANTS The fungus. The mycelium is abundant in the intercellularspaces, varying in diameter from 8 to 12 ^l, but frequently it isof less diameter in the more compact tissue of Vitis vinifera. Inthe leaves the fungous hyphae may be found throughout the partaffected, except in the woody parts of the bundles of the veins andin the stem. They occur also
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