Fungi and fungicides; a practical manual, concerning the fungous diseases of cultivated plants and the means of preventing their ravages . asses of sporesare escaping. These stylospores are scattered through the vine-yard, and those which lodge upon green grapes with adroj) of moisture present, germinate by sending out alittle tube, which penetrates the skin and starts the dis-ease anew. Besides these stylospores, there are three otherkinds of spores produced by the black rot fungus. Theyare called by botanists the spermatia, the conidia, andthe ascospores. The latter are produced in May andJu
Fungi and fungicides; a practical manual, concerning the fungous diseases of cultivated plants and the means of preventing their ravages . asses of sporesare escaping. These stylospores are scattered through the vine-yard, and those which lodge upon green grapes with adroj) of moisture present, germinate by sending out alittle tube, which penetrates the skin and starts the dis-ease anew. Besides these stylospores, there are three otherkinds of spores produced by the black rot fungus. Theyare called by botanists the spermatia, the conidia, andthe ascospores. The latter are produced in May andJune, by the mycelium in the berries destroyed the pre- THE BLACK ROT 81 vious year, and so are supposed to start the disease forthe season. Full accounts of the development of thesevarious spores will be found in the articles referred tobelow, under the head of Literature. Treatment.—Spray with the ammoniacal solutionof copper carbonate or the Bordeaux mixture five toeight times, making the first application when the budsbegin to swell, early in May in the Northern States, andrepeating at intervals of fifteen days. In case Bordeaux. FIG. 39. OUTFIT Foil SPRAYING GRAPES. mixture is used, substitute the ammoniacal solution forthe last one or two sprayings, to avoid spotting the time of the first apj^dication will, of course, varywith the latitude,—earlier in the South than at theNorth. A convenient spraying outfit for vineyard useis illustrated in Fig. 39. It consists of a barrel witlipump attached, mounted crosswise in a wagon. Oneman drives and pumps, and another sprays the vinesbehind the wagon. The hose terminates in an S-shaped 82 PUNGI AKD FUNGICIDES pipe, by means of which the operator can spray any partof the vines. The great increase in value of sprayedover iinsprayed grapes has been repeatedly has been found that spraying with Bordeaux mixturenot only prevents the disease, but keeps the vines in amuch healthier and more thrifty condition tha
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectpathoge, bookyear1896
