February, 1912 



tut CANADIAN HORTICULTURIST 



i^ 



Orchard Spray Calendar for 1912 



Prot. Wm. Lochhead, Macdonald College, Que. 



Fruit-growers should begin preparations for the spraying of their orchards in early spring. The spraying outfits should be 

 thoroughly overhauled and tested so that there may be no delays in the busy season. Extra lengths of strong hose, capable of 

 withstanding 250 pounds pressure, and supplies of nozzles of the kind that experience has shown to be the best, should be 

 procured for cases of emer,gency. In addition, the necessary season's supply of chemicals, such as lime-sulphur (or the com- 

 mercial lime-sulphur, if that is preferred), bluestone, good stone lime, Paris green, or preferably Arsenate of Lead, and White 

 Arsenic, should be purchased and stored in readiness for active operations. If the lime-sulphur wash is to be made on the prem- 

 ises, attention should be given to the construction of a suitable boiling outfit, so that no delay may result at the last moment. 

 There should also be a goodly supply of coal-oil barrels on hand for storing stock solutions of lime-sulphur and Bordeaux. 



Tomato 



Spray plants in seed bed with Bordeaux; spray at intervale with Bordeaux if danger of rot or loaf-spot is feared. 



Spraying Mixtures 



1. HOME-MADE CONCENTRATED LIME-SULPHUR WASH.— A combined insecticide and rungii;ido, hence a very valuable spray. 

 FORMULA.— Lime, 50 lbs.; sulphur, 100 lbs. and water. 40 gals.; prepared by boiling for nearly an hour, and afterwaixls diluted to proper 



strength A hydrometer is necessary to get the proper dilutions: 1 (a) in early spraying on d>rmanit wood wash should have a specific 

 gravity of 1.030; 1 (b) for spraying before blossoms burst a sp. gr, of 1.0O9; and 1 (c) for spraying just after blossoms fall— 1.008. (For 

 details see Prof. L. Caesar's Reports.) 



2. COMMERCIAL LIME-SULPHUR WASH.— 2 (a) used on dormant wood at the rate of 1 g aL t« 9 gals, water; 2 (b) on foliage 1 gal. to 40 

 gals, water. 



3. ARSENATE OF LEAD A valuable insecticide for biting insects, (a) used alone— 2 lbs. to 40 gals, water; (b) with lime-sulphur wash 



or with Bordeaux mixture— 2 lbs. to 40 gals, of the wash. 



4. PARIS OREEN,— Used for poisoning biting insects, '/i-Va lb. to 40 gals, water; 1-2 lbs. . qnickUme should be added to prevent burning. 

 Usually applied along with Bordeaux. 



5. WHALE-OIL SOAP.— A good contact insecticide for sucking insects such as plont-lioe, leaf-hoppers, etc.— 1 lb. soap to 6-6 gals, of hot 

 water. 



6. HELLEBORE.— (a) 1 oz. steeped in 2 gals, water; or (b) used dry, pure or mixed with 5 parts of cheap dry flour. 



7. BORDEAUX MIXTURE.— The standard fungicide. 



FORMULA —Copper sulphate, 4 lbs.: best stone lime, 4 lbs.; water. 40 gals. Dissolve the copper sulphate in a bajrel In warm water, 

 and make up to 20 gallons; slake the lime slowly in a second Imrrel. and add water to make up 20 gals.; pour the lime mixture into the 

 sulphate solution. If the prepared Bordeaux turns reddish with the addition of a little ferro-cyanido of potash add more lime. 

 8. POISONED BORDEAUX.— 2— 3 lbs. of arsenate of lead, or '/, lb. Paris green, added to Bordeaux, as prepared in 7. 



