SPRAYING FOR DISEASES 



261 



Practical Exercises 

 1. Preparing and Using the Lime-sulphur Lcad-arsenate Mixture 



If one wishes to prepare his own material, see Lesson 

 64. The stock solution is diluted and used as described 

 above. 



Force the spray thoroughly and completely onto 



Courtesy of B. F. Johnson Pub. Co. 

 FIG. 78. THE CODLING MOTH 



every leaf, twig, stem, and fruit of the tree. When 

 the codling moth larva hatches from the eggs which 

 have been laid on the leaves and the apples, and begins 

 to crawl toward the apples, it may nibble at some of 

 the poisoned leaves, but it is sure to get its last meal 

 as it attempts to eat into the blossom end of the fruit. 

 If this operation of spraying is repeated in about three 

 or four weeks after the blossoms fall, and then in mid- 

 summer to combat the second brood, the trees and fruit 



