192 2 The Cornell Reading-Courses 



8. How can the injury to the fruit by redbugs be distinguished from 

 that caused by the plum curculio or the apple aphis? 



9. Have you ever used a miscible oil as a dormant spray on the apple 

 to control the leaf roller? If so, with what results? 



10. How would you spray an apple orchard badly infested with codling 

 moth, redbugs, and green fruit- worm? 



Name. . 

 Address . 

 Date . . . 



