2o8 Bulletin 396 



killed in the fourth instar, after the falling of the petals, but not so easily 

 as in the younger stages or when the apple blossoms were just opening. 

 No further spraying for redbugs was necessary in the orchard where the 

 spraying described above was done, and it was difficult even to find live 

 bugs later in the season. In 19 16 the bugs could be found in the orchard, 

 but not in numbers sufficient to require spraying. It is apparent that 

 where the bugs are thoroly cleaned out by spraying it will take at least 

 three years for them to get thick enough to make it worth while to fight 

 them again. 



318 



