Fungi and fungicides; a practical manual, concerning the fungous diseases of cultivated plants and the means of preventing their ravages . remature inheading and ripening up the leaves. The characteristicsnow become rather more evident. The affected headsretain a bluish-green, or greenish-lead color, for sometime after tlie sound ones begin to ripen, and then takeon a bleached appearance, in strong contrast to the yel-low of the sound heads; the heads being much lighterstand more erect, and the chaff and beard are more ojoenand spreading (Fig. 81). If the injured kernels arebroken open they ar
Fungi and fungicides; a practical manual, concerning the fungous diseases of cultivated plants and the means of preventing their ravages . remature inheading and ripening up the leaves. The characteristicsnow become rather more evident. The affected headsretain a bluish-green, or greenish-lead color, for sometime after tlie sound ones begin to ripen, and then takeon a bleached appearance, in strong contrast to the yel-low of the sound heads; the heads being much lighterstand more erect, and the chaff and beard are more ojoenand spreading (Fig. 81). If the injured kernels arebroken open they are found to contain a solid mass ofblack powder—the spores of the fungus. The life-historv of this funsrus does not differ essen-tially from that of the loose smut of oats already dis-cussed (pp. 187-193). 194 THE BUNT OR STINKING SMUT 195 Treatment.—This smut may be prevented by thehot water treatment mentioned in connection with oatsmut. Mr. W. T. Swingle gives the following directionsfor treating seed wheat: *^ Provide two large vessels—as two kettles over afire, or boilers on a cook stove—the first containing warm S^ \ \^. FIG. 81. WHEAT BUNT. water (say 110° to 130°) and second containing scaldingwater (132i°). ^The first is for the purpose of warming the seed,preparatory to dipping it into the second. Unless thisprecaution is taken, it will be difficult to keep the waterin the second vessel at a proper temperature. 196 FUXGI Ai^D FUI^GICIDES ^The seed which is to be treated must be placed, ahalf bushel or more at a time, in a closed vessel, thatwill allow free entrance and exit of water on all this purpose a bushel basket made of heavy wirecould be used, with which spread wire netting, saytwelve meshes to the inch, or an iron frame could bemade at a trifling cost, over which the wire netting couldbe stretched. This would allow the water to pass freely,and yet prevent the joassage of the seed. A sack madeof loosely woven material (as gunny sack) could,
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectpathoge, bookyear1896
