502 Repoet of Farmees' Institutes 



unsprayed trees, amounting to only 6.36 per cent. This compara- 

 tive freedom occurred in the near vicinity of trees that showed 

 serious codling moth injury in 75 per cent of the apples lying on 

 the ground, indicating that the pest — under certain conditions, 

 at least — will become very abundant. A similar freedom from 

 codling moth injury was also noted in several orchards habitually 

 sprayed but once for this pest. There was this in common for the 

 trees nearly free from codling moth injury: they had been sprayed 

 annually, whether in fruit or not, and it is more than probable that 

 the treatment was thorough. Our conclusions may be briefly sum- 

 marized as follows : 



The first spraying for the codling moth — the treatment just 

 after blossoming — is by far the most effective application for 

 controlling the pest. 



The presence of abundant side injury is a most potent argu- 

 ment for thorough annual sprayings for the codling moth, whether 

 the trees be fruiting or not. This may not be necessary where 

 side injury is not serious, as, for example, in the Hudson Valley. 



The second spraying for the codling moth would probably be 

 more eifective in reducing side injury if it were made the latter 

 part of June or early in July, although, so far as checking this pest 

 is concerned, it does not seem to be essential. 



Both the second and third sprayings for the codling moth, 

 even if they have comparatively little influence in reducing the 

 numbers of this pest, are abundantly justified in localities where 

 scab is more or less prevalent, assuming, of course, that a fungicide 

 is universally added to the poisoned spray. 



