50 NEW YORK STATE MUSEUM 



SUMMARY AND CONCLUSIONS 



A general survey of the conditions in the apple belt of the western 

 part of the State shows that some growers are able to obtain practi- 

 cally worm-free apples with one spraying for the codling moth, 

 others with two or three applications, while many suffer great losses 

 in spite of frequent and apparently thorough treatments. We 

 believe that practically all these conditions can be found throughout 

 the belt. It logically follows that if one man can control the pest, 

 his neighbor should be able to do equally well, and the difference 

 depends largely upon the thoroughness with which the work is done. 

 It is no easy matter to control this pest effectively, especially during 

 seasons when many eggs are deposited late in June and early in July. 

 The peculiar habits of the young apple worm.s hatching from late- 

 deposited eggs, make it very difficult to destroy m.any by late spraying, 

 and consequently freedom from side injury one season is determined 

 in considerable measure by the treatment of the preceding year. 

 We can hardly expect, under conditions prevailing in the western 

 part of the State, to clean up badly infested orchards in one season. 

 It will require two and possibly more. Generally speaking, unsatis- 

 factory results are due to some deficiency or weakness in the treat- 

 rnent which can be eliminated only by careful search for the weak 

 point. 



The first spraying for the codling moth, the treatment just after 

 blossoming, is by far the most effective application which can be 

 made for controlling the pest. 



The presence of abundant " side injury " is a most potent argument 

 for thorough annual sprayings for the codling moth whether the 

 trees be fruiting or not. This may be unnecessary where " side 

 injury " is not serious as, for example, in the Hudson valley. 



The second spraying for the codling moth would probably be 

 more effective in reducing " side injury " if it were made the latter 

 part of June, though 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. 



