10 



of the previous spray which might have been washed off by the rain. With 

 these two sprayings thoroughly applied with a good spray mixture good results 

 will be obtained. 



SPRAYS. 



There are numerous fungicidal sprays which could be used for the control 

 of black-spot canker. Two of the best known and most generally used are 

 lime-sulphur and Bordeaux mixture. It is difficult to say which is the best, 

 but it is generally conceded that Bordeaux mixture sticks better and is a 

 stronger fungicide than lime-sulphur, and will give better results in the fall 

 spraying for the control of this disease. Lime-sulphur can be obtained at most 

 hardware stores, and for this spraying a lime sulphur testing 32 Beaume 

 should be diluted 1 to 9 (1 gallon of lime sulphur to 9 gallons of water). 

 Use Bordeaux mixture at its double strength (8 IT), good stone-lime, 8 It). 

 copper-sulphate, and 40 gallons of water), the manufacture of which is 

 described below. 



BORDEAUX MIXTURE. 



Where the Bordeaux mixture is to be used in quantity it is advisable to 

 make stock solution. To make a stock solution of copper-sulphate, put 20 

 gallons of water in a 40-gallon barrel; place in a sack (preferably of a coarse 

 nature, such as a light bran-sack) 80 IT), of copper-sulphate (blue-stone) ; 

 suspend this in the barrel so that the bottom of the sack is 5 or 6 inches 

 under water. In a few hours, or at least a few days, the copper-sulphate will 

 go into solution. Mark on the inside of the barrel the surface of the solution, 



N..//I.-N of Bordeaux Hint uprnj ) and circular up ray tine with aiiRle. 



