Farm crops, their cultivation and management, a non-technical manual for the cultivation, management and improvement of farm crops . ults,since dampness favors injury from the gas. For nursery stock it is customary to employ for each 100 cubic feetenclosed, the following: Cyanide of potassium 1 ounce Sulphuric acid 1. 25 fluid ounces Water 3 fluid ounces 1 Courtesy of U, S. Dept. of Agriculture. INSECTICIDES AND FUNGICIDES 273 FUNGICIDES When all has been said the number of fungicides approved by theexperience of practical and scientific men is very small. Many have beenrecommended, but compar
Farm crops, their cultivation and management, a non-technical manual for the cultivation, management and improvement of farm crops . ults,since dampness favors injury from the gas. For nursery stock it is customary to employ for each 100 cubic feetenclosed, the following: Cyanide of potassium 1 ounce Sulphuric acid 1. 25 fluid ounces Water 3 fluid ounces 1 Courtesy of U, S. Dept. of Agriculture. INSECTICIDES AND FUNGICIDES 273 FUNGICIDES When all has been said the number of fungicides approved by theexperience of practical and scientific men is very small. Many have beenrecommended, but comparatively few have stood all the tests as to effective-ness, convenience of application and cheapness. Copper Sulphate.—At the head of the list stands copper sulphate, acheap, effective fungicide, commonly known as bluestone. This is theactive and most essential ingredient of Bordeaux mixture. Concentratedsolutions of it cannot be used alone on foliage because of their caustic winter on dormant trees it is sometimes used for fungous troubles, abouttwo pounds being dissolved in a barrel of water. A weaker solution—1. Efficiency of Bordeaux Mixture on One Row pound in 200 gallons of water—may be used on foliage in summer whenfruit is well matured and it is not desirable to use sprays like Bordeauxmixture, which leave a residue. The bluestone may be quickly dissolvedby pouring boiling hot water over it. When one is not hurried it may bedissolved by suspending in a loose sack in the water. It dissolves slowlyif simply thrown in the water and allowed to settle. To avoid to some extent the delays involved in dissolving bluestone itis well to buy a finely powdered grade now manufactured for the makingof fungicidal preparations. Bordeaux Mixture.—A standard formula for the preparation of thisvaluable mixture is the following: Bluestone 4 pounds Fresh lime . 4 pounds Water 50 gallons * Courtesy of New York Agricultural Experiment Station, Geneva, N
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Keywords: ., bookcentury1900, bookdecade1910, bookidfa, booksubjectagriculture
