Fungi and fungicides; a practical manual, concerning the fungous diseases of cultivated plants and the means of preventing their ravages . schecked, and it finallv be-comes a dry, withered massof skin, surrounding the par-tially developed seeds. Themanner of development uponthe leaves is similar to that FIG. 43. ELVIRA GRAPE AFFECTED UpOU thC grCCU shoOtS. LlkC BY AXTHRAcxosE. ^^j^g^, fungi, thc authrac- nose fungus reproduces by means of minute spores, someof which are represented, highly magnified, at Fig. 44 c. THE GEAPE ANTHRACKOSE 89 When one of these spores falls upon a green leaf, stem
Fungi and fungicides; a practical manual, concerning the fungous diseases of cultivated plants and the means of preventing their ravages . schecked, and it finallv be-comes a dry, withered massof skin, surrounding the par-tially developed seeds. Themanner of development uponthe leaves is similar to that FIG. 43. ELVIRA GRAPE AFFECTED UpOU thC grCCU shoOtS. LlkC BY AXTHRAcxosE. ^^j^g^, fungi, thc authrac- nose fungus reproduces by means of minute spores, someof which are represented, highly magnified, at Fig. 44 c. THE GEAPE ANTHRACKOSE 89 When one of these spores falls upon a green leaf, stem orfruit where there is a particle of water, it sends out agerminating tube, which penetrates the skin or the inside it begins the production of myceliumwhich grows near the surface, and finally produces, incertain spots, quantities of spores. These masses ofspores gradually push the skin outward, as shown in a,and finally rupture it and escape, as seen in h. Theyare then blown and washed about, and such of them asalight on the green parts of other vines when conditionsare favorable for germination, start the fungus .% IP 6 & FIG. 44. , fc, Vertical section of grape showing development of spores; c, spores. Magnified. The light colored and white varieties of grapes arethe ones most affected by anthracnose. A bunch ofElviras injured by this disease is represented in Fig. 43. Treatment.—This is a difficult disease to treatment usually recommended is to cut out allinjured canes during winter, and early in spring, beforethe buds start, to spray the vines thoroughly with astrong copperas (iron sulphate) solution. Mr. E. has reported successful results from a solution often pounds of copperas to a barrel of water. In casethe disease appears, a powder composed of equal parts 90 FUNGI AXD rUITGIClDES of sulphur and lime may be dusted on; or the Bordeauxmixture may be applied. Literature.—Professor F. L. Scribner has joub-lished, i
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectpathoge, bookyear1896
