BXPERIMExXT STATION BULLETINS. 293 



Study carefully the nature of the insect or disease and select the remedy 

 that is most likely to destroy it without injuring the plants. 



Do not spray while the trees are in blossom, as the bees will be de- 

 stroyed: they are necessary to fertilize the flowers. 



Pumps for the application of insecticides and fungicides should be 

 sufficiently powerful to cover the trees or plants with a fine mist, and 

 where copper compounds are to be used, the working parts should be of 

 brass, and if all portions that are to come in contact with the spraying 

 mixture are of brass, the durability of the pump will be greatly increased. 



L. R. TAFT, 

 Ho7i;iculturist. 



C. D. Smith, 



Director. 



