APPLE GROWING 



ing a nozzle. First of all, It must be of con- 

 venient form so as not to catch In trees and 

 so constructed that It will not clog easily. 

 Second, for apple trees It should have good 

 capacity and deliver as spreading a spray as 

 possible. Third, the nature of the spray is 

 very Important. Insecticides should usually be 

 applied with force In a comparatively coarse 

 driving spray, but fungicides should be applied 

 In a fine mist or fog so that they will settle on 

 every part of the tree. Therein lies the diffi- 

 culty of applying insecticides and fungicides to- 

 gether. 



Time of Spraying. — Fortunately It is not 

 necessary to make a separate application for 

 each insect and disease, but they may be treated 

 together to some extent. In most cases expedi- 

 ency demands that the arsenlcals be used with 

 the fungicides. Many growers are finding the 

 most satisfactory results, however, from apply- 

 ing the arsenical spray separately, just after the 

 blossoms fall, because of the physical impossi- 

 bility of properly applying the two sprays — the 

 driving and the mist spray — together. For 

 most practical purposes on the general farm, 

 three sprayings are necessary in order to secure 

 clean fruit and four, sometimes five, are often 

 124 



