. Textbook of botany. Botany. 382 TEXTBOOK OF BOTANY entire fruit. "The fruit now decays, and in the meantime the fungus produces an abundance of spores, which may be scattered by the wind or may remain on the stems and leaves to spread the disease the following year. The fruit finally becomes hard, shriveled, and wrinkled (Fig. 216); in this condition it either remains on the stem or falls to the ground. The next spring the plant body of the fungus, which has remained dormant in the decayed fruit, develops a saucer-shaped fruiting body on a short stalk. Within this saucer are borne an im
. Textbook of botany. Botany. 382 TEXTBOOK OF BOTANY entire fruit. "The fruit now decays, and in the meantime the fungus produces an abundance of spores, which may be scattered by the wind or may remain on the stems and leaves to spread the disease the following year. The fruit finally becomes hard, shriveled, and wrinkled (Fig. 216); in this condition it either remains on the stem or falls to the ground. The next spring the plant body of the fungus, which has remained dormant in the decayed fruit, develops a saucer-shaped fruiting body on a short stalk. Within this saucer are borne an immense number of small sacs in each of which eight spores are produced. In order to check the ravages of this fungus it is necessary to remove the diseased portions of the plant as soon as they are Fig. 217.—Spores of discovered. These, with the decayed the brown rot fungus fruits from the tree and ground, should at a; b, germinating , t. i, j 1. spores. After Weed. ^* °^'^^ °^ burned, because the spores may be carried to a considerable distance by the wind. Spraying also helps to check the growth of the fungus. For this purpose, modifications of the ordinary Bordeaux mixture and a lime-sulphur wash are probably the 386. Powdery Mildews. — More than sixteen hundred species of seed plants are known to be attacked by one or another of these parasitic fungi. Although strict parasites, ' Lime-sulphur wash. This can be obtained in prepared form, or it may be made according to the following formula: Flowers of sulphur, lo pounds. Stone lime, 10 pounds. \\'ater, 50 gallons. The lime is poured into a barrel, three to five gallons of water are added, then the sulphur is sifted in and the whole mixture is stirred while the Ume is being slaked. More water is added as the mixture becomes heated. W'lieu the Ume is entirely slaked the rest of the water may be Please note that these images are extracted from scanned page images that may have been digitally enhanced for
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