266 REPORT ON THE No. 24 



directions for treatment of insect pests and plant 



diseases. 



formul.t:. 



1. Bordeaux Mixture (For Fung-ous Diseases). 



Copper Sulphate (Bluestone) 4 pounds. 



Quick lime (fresh) 4-6 " 



Water 40 g-allons. 



In making this mixture, observe tlie following- precautions and directions : 



1. Use 7iothino but fresh quick-lime. Owing- to variability in the qualities of 

 lime as found in different parts of the Province, it is safer for the averag-e fruit 

 grower to use the larger quantity named above, viz., 6 pounds. The lime should 

 be slowl)' slaked by the gradual addition ot water. 



For convenience, stock solutions of milk of lime and bluestone should be 

 prepared and kept in different barrels in readiness for spraying operations. In 

 barrel No. 1, '25 pounds of fresh lime are gradually slaked, and barrel made up 

 to 25 gallons of water ; in barrel No. 2, 25 pounds of copper sulphate, or blue- 

 stone, are dissolved in 25 gallons of water. For rapid dissolving use warm water. 

 These are stock solutions. Each gallon of milk of lime contains one pound of 

 lime, and each gallon of bluestone solution contains one pound of bluestone. 

 When we wish to make up a barrel of Bordeaux mixture, we take out 4 gallons 

 of milk of lime, if using the 4-pound forn-iula, or 6 pounds if using the 6-pound 

 formula, and 4 gallons of bluestone solution, and either dilute each in separate 

 barrels in about 20 gallons of water before mixing in the barrel attached to the 

 spray-pump, or else pour each separately into the barrel in which are already 30 

 to 32 gallons of water, according to formula used. The first method is the pre- 

 ferable one. 



2. Never inix the concentrated stock sohitions together. If the milk of lime 

 and bluestone are mixed in the concentrated form, just as they are taken from 

 the stock solution, a precipitate of a flakey nature will soon settle out, and either 

 fall to the bottom or clog the nozzle. 



3 Test the Bordeaux to find out wfietfier sufficient milf: of lime fias bee?i 

 added. This is most easily done b}' means of the ferrocyanide test. A saturated 

 solution of this substance can be purchased at any druggist's for a few cents. In 

 testing, place some of the Bordeaux, which has been thoroughly stirred, into a 

 saucer, and add a few drops of the ferryocyanide. If sufficient lime has been 

 used, no discoloration will appear, but if insufficient, a deep dark brown color 

 will be produced. 



4. Always strain tlie millz of lime to prevent grittv particles from clogging 

 the nozzles. 



5. Use a fine noz-zle ; do not soak or drench the tree. 



6. The stocf: solutions will keep, but the Bordeaux mixtures becomes useless 

 after standing for a day or two. 



2. The Combination Borde.vux and Paris Green Mixture. 

 (For Fungous Diseases and Leaf-eating Insects.) 



This mixture is prepared like the Bordeaux, but 4 to 6 ounces of Paris green 

 are added and thoroughly stirred before spraying. 



Copper sulphate (Bluestone) 4 pounds. 



Quick lime (fresh) 4-6 " 



Paris green ; 4-6 ounces. 



Water (1 barrel) 40 gallons. 



