REPORT OF TPE SOCIETY 137 



It will be seen that under laboratory conditions the summer spray may 

 be practically 100 per cent efficient. While such a complete success cannot 

 be expected in the field there is no doubt that summer spraying can be used 

 to advantage. 



The advisability of applying the summer spra>- depends on the con- 

 ditions, In a severe attack when the spring spray has failed to control 

 the pest the application of this spray at the end of June is strongly advised. 

 If it is necessary to spray for apple scab at this time the addition of lead 

 arsenate to the spray is recommended in order to control the bud moth. 



Dormant Sprays. Wilson and Moznette in Oregon attempted to kill 

 the hibernating larvae in February and March, 1914, by spraying with dis- 

 tillate oil emulsion, crude oil emulsion and Yel-Ros, but came to the con- 

 clusion that these sprays were not efficient against the bud moth. 



