. Fungi and fungicides; a practical manual, concerning the fungous diseases of cultivated plants and the means of preventing their ravages . uce a compound very injurious to foliage. Paris greenor London purple added to simple solutions of coppersulphate, or to ammonia compounds without lime, in-jures foliage vastly more than in simple water mixture. COST OF FUNGICIDE MATERIALS The approximate wholesale and retail price of themore important substances used for fungicides is indi-cated below: Wholesale. HHtiil. Per lb. Ierlb. Ammonia (22° lianme) $ .IrO.^O Carbonate of copper (Precipitated)
. Fungi and fungicides; a practical manual, concerning the fungous diseases of cultivated plants and the means of preventing their ravages . uce a compound very injurious to foliage. Paris greenor London purple added to simple solutions of coppersulphate, or to ammonia compounds without lime, in-jures foliage vastly more than in simple water mixture. COST OF FUNGICIDE MATERIALS The approximate wholesale and retail price of themore important substances used for fungicides is indi-cated below: Wholesale. HHtiil. Per lb. Ierlb. Ammonia (22° lianme) $ .IrO.^O Carbonate of copper (Precipitated)... .40 .60 Carbonate of ammonia 14 ••JO Li ver of sulphur 15 .25 Lime, per barrel (300 pounds) Soda carbonate 04 .10 Soda liypo-sulphite 06 .15 Sal soda 01V* .05 Sulphate of copper (Powdered) 07 to .00 .12 to \o Sulphate of copper (Crystals) 0,5 .10 Sulphur 03 .10 THE APPLICATION OF FUNGICIDES Fungicides may be applied to plants, either in theform of a dry powder or a liquid solution. In the for-mer case they are usually most easily handled by meansof a powder bellows—such as Leggetts powder gun— 22 FUXGI AXD FUNGICIDES. and in tlie latter by means of some form of spraying pump. In both cases it is important that they be finely divided and evenly distributed. There are many forms of spraying 2:)umps uj^on the market. In general they are of four sorts : The bucket l^umj^s, the knapsacksprayers, the barrel spray-ers, and the geared auto-matic machines. Theform of tlie knapsacksprayer is shown in Fig. is useful in some cases,but in general the carry-ing of the reservoir andcontained liquid shouldnot be imposed on liumanshoulders. A convenientbarrel outfit is shoAvn inFIG. 8. KNAPSACK sPKAYER. ^jg. 9. The barrel has upon it a double discharge pump, to which are attachedtwo lines of hose, provided Avith good nozzles, and fas-tened at the end to poles. Three men oi3erate the ma-chine, one driving and j^umping, and two directing thespray. Many different kinds of sj
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectpathoge, bookyear1896
