i94 Apple " Scab " or "Black Spot." [tune, 



present would be of no danger to the public health. In such 

 cases the fruit may be sprayed with the following fungicide : — 



Dilute the ammonia with about 2 gallons of water. Place 

 the copper sulphate in a wooden or earthenware receptacle, 

 and pour on a little of the diluted ammonia ; stir vigorously, 

 allow it to settle, and then pour off the solution into another 

 similar receptacle, leaving the undissolved portion behind. 

 Repeat this operation until all the copper carbonate is dis- 

 solved, using only as much of the diluted ammonia as is 

 necessary to complete the solution. Then add water to make 

 up to 50 gallons. A clear light-blue solution will be obtained, 

 which will keep indefinitely. Arsenical washes (arsenate of 

 lead, &c.) cannot be added to this fungicide. 



As a rule, however, two or three sprayings with Bordeaux 

 mixture alone will be amply sufficient to keep the fruit clean. 

 The mixture after again straining must be thoroughly applied by 

 a spraying machine provided with a nozzle which gives a fine 

 misty spray. Enough spray should be applied to make the sur- 

 face of the leaves uniformly wet, but spraying should cease before 

 the leaves begin to drip. If Bordeaux mixture (made as described 

 above) is applied in a fine misty spray it will be found to 

 adhere perfectly, and will not be washed off by rain for many 

 weeks. There is no need to add any sticky substance such as 

 treacle, and no advantage is gained by doing so. 



If the young wood has become severely attacked, as much as 

 possible of it should be cut out in pruning. Then the trees 

 should be sprayed in winter while the wood is dormant with 

 the following winter wash : — 



This winter-wash is fully strong enough to kill the parts 

 of the fungus with which it comes into contact, and there is 

 no advantage gained in using a stronger wash. 



Certain varieties of apples are specially susceptible to apple 

 " scab," and such varieties should be looked over carefully 

 and special attention paid to keeping them clean. 



Copper carbonate 

 Strong ammonia 

 Water ... 



5 ozs. 



2 to 3 pints. 

 50 gallons. 



Copper sulphate ("bluestone ") 

 Water ... 



2 lb. 

 50 lb. 



