424 STATE BOARD OF AGRICULTURE. 



recommended in this bulletin the amount of arsenate recommended is 

 considered to be in the powdered form. When the paste form is used, 

 twice the weight of the powder is required. When using arsenate of 

 lead alone on stone-fruits, from three to five pounds of freshly slaked 

 or of hydrated lime, to each 50 gallons of the spray, may be added to 

 prevent foliage burning. Arsenate of lead may be mixed with lime- 

 sulphur, bordeaux or any of the other common fungicides to make a com- 

 bination spray. 



PARIS-GREEN AND LIME. 



Never mix Paris-green with lime-sulphur in any form. Paris-green 

 can, however, be used with bordeaux-mixture with safety. 



For sprajnng from a barrel, the writer has found the following 

 method very useful : Place from i/^ to one pound of good lump lime, or 

 unslaked lime, in each of three or four tin pails which will hold about 

 three quarts or less. Old cans or crocks will answer just as well. 

 Add enough hot water to slake it into a thin cream or paste. Now add 

 to each lot 14 pound of Paris-green, previously weighed out, and placed 

 in la paper bag; stir in the Paris-green wbile the lime is hot and allow 

 to. stand for some time. Now measure out about 44 gallons of water in 

 your spraying barrel, and make a mark that will show how high it 

 comes in the barrel; add the contents of one tin pail (viz. i/4 pound of 

 Paris-green and % pound of quick-lime slaked) into the 44 gallons of 

 water in the barrel. Stir well and spray. The pails or crocks can be 

 used one at a time and re-filled from time to time so that the stock 

 is always on hand ready for use. 



ARSENATE OF CALCIUM KEDZIE MIXTURE. 



This mixture, originated by the late Dr. K. C. Kedzie of this Station, 

 is cheap, but it has the disadvantage of lacking a warning color. It 

 must be made with care, and stored in well-labeled jugs. It is made of 

 white arsenic (not arsenate of lead) and carbonate of soda. 



Dr. Kedzie in giving directions for its preparation states: — "Dis- 

 solve the arsenic by boiling with carbonate of soda, and thus insure 

 complete solution; which solution can be kept ready to make a spray- 

 ing solution, whenever needed. To make the material boil two pounds 

 of white arsenic with eight (8) pounds of sal-soda (crystals of car- 

 bonate of soda — 'washing soda' — found in every grocery and drug 

 shop) in two gallons of water. Boil these materials in any iron pot 

 not used for other purposes. Boil for fifteen minutes or until the 

 arsenic dissolves, leaving only a small muddy sediment. Put this solu- 

 tion into a two-gallon jug and label, ^Poison, stock material for spray- 

 ing mixture' ". 



"The spraying mixture can be prepared whenever required, and in 

 the quantity needed at the time by slaking two pounds of stone or lump 

 lime,* adding this to forty gallons of water; pour into this a pint of 

 the stock arsenic solution. Mix by stirring thoroughly, and the spray- 

 ing mixture is ready for use. The arsenic in this mixture is equivalent 

 to four ounces of Paris-green." 



•Three pounds of fresh hydrated lime may be made to take the place of the two pounds 

 of stone or lump lime. 



