THE ArrLICATION OF SPRAYS. 



175 



SPRAYINC} TANKS. 



A oTout varietN' of forms and sizes of spray tanks arc in use. For 

 small orchards, scarcely anything- better could be desired than large 

 oak ]>arrels holding (50 to 80 gallons. These ma}' bo swung upon 

 wheels separated}' if desired, but the most convenient way is to place 

 them lirmly in a one or two horse wagon. Large tanks, well hooped, 

 are also very suitable for large orchards. Casks of this kind, holding 

 300 gallons, may easily be placed in the bottom of a two-horse wagon, 

 leaving abundant room for placing and operating the heavy hand 

 pump. Such casks are shown in Pis. XXVII and XXVI II. The 

 manner of securing the tank hy placing sid(^ timbers inside of the 

 wagon bolsters is shoMn in PL XXII, 

 as is also the stirring stick which 

 projects from a square hole in the 

 top of the cask. 



KiH'tangular plank tanks are used 

 by some, l)ut it is generally foiuid 

 more ditiicult to keep th(>m from 

 leaking than in the case of casks, 

 where the hoops luay be tightened 

 at will. Numerous spray carts, ])ar- 

 rel attachments, etc., are illustrated 

 in E. G. Lodeman's work on The 

 Spra3'ing of Plants. 



The use of iron tanks is rare, and 

 is hardly to be advised for general 

 spray work, owing to the corrosive 

 action of many sprays. For special 

 sprays, as the kerosene emulsion, 

 such tanks may, however, be safely 

 employed. 



All spray tanks should be arranged 

 in such a manner as to be easily 

 cleaned, especially where Bordeaux mixture or the sulphur spra3^s are 

 to be used, and they should be provided with some means for stirring 

 or agitating the spray. The entrance to all suction pipes should be 

 guarded with iine brass wire screen. It is well to wanh. the tanks out 

 thoroughl}" at least once a day. 



Fig 10. — ^Pneumatic pump for general 

 spraying. 



APPLYING WINTER SPRAYS FOR CURL. 



A study of the many experiments conducted by the growers and 

 described in this bulletin will give much information relative to the 

 proper time for applying sprays for the control of curl. A presenta 

 tion of a few general principles involved may, however, be properly 

 made in this place. 



