. The Book of gardening; a handbook of horticulture. Gardening; Floriculture. 1104 THE BOOK OF GARDENING. Such perithecia disclose their contents, and the spores are released to be distributed by insects, birds, wind, or even by- man himself, those finding a suitable " home" germinating, increasing the area of the disease. And similarly with other parasitic fungi which attack leaves, &c. The gardener's chief difficulty with all is that his first acquaintance with any is usually when much mischief has been done. His first indications are when the fungus has existed sufficiently lo
. The Book of gardening; a handbook of horticulture. Gardening; Floriculture. 1104 THE BOOK OF GARDENING. Such perithecia disclose their contents, and the spores are released to be distributed by insects, birds, wind, or even by- man himself, those finding a suitable " home" germinating, increasing the area of the disease. And similarly with other parasitic fungi which attack leaves, &c. The gardener's chief difficulty with all is that his first acquaintance with any is usually when much mischief has been done. His first indications are when the fungus has existed sufficiently long to produce out- ward characteristics—like the familiar Mildew on the Straw- berry, the " Rust" on Chrysanthemum, or the Mushrooms in the roots of his orchard and landscape trees like Agaricus vielleiis {^Armillaria melled). Again, he does not seem able to. Fig. 718.—Portion of Cankered Tree, due 10 Xectria ditissima. (By permission of the Board of Agticiilture.) reconcile the fact that such fungi have forms of fruits, or spores, varying with the seasons ; each has its part to play in the reproduction, or it may be in the extension of the infected area, of the species. Then just as there are in the Animal World certain parasites—like, say, the hydatid which causes gid in sheep,, and which needs another host, the dog, to complete the cycle, so there are certain small fungi (called heteroecious) which require two plants—sometimes of widely different natural orders—to complete the cycle. The Gooseberry Rust {^^cidium grossularice)^ whose orange-red patches are familiar upon the foliage and fruit of that plant, is but the Cluster-Cup stage of Piiccinia Fringsheimiana, whose other stages are found upon Carex acuta and Carex Goodenovi; while the Rust, found on the leaves and other parts of Barberries, is likewise a stage in the life-history of a still more destructive fungus known as Wheat Rust i^Puccinia gi-aminis). These are only two familiar examples of heter
Size: 2393px × 1044px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1900, booksubjec, booksubjectgardening
