TWENTY-SEVENTH REPORT OF STATE ENTOMOLOGIST 



27 



CODLING MOTH 



(Carpocapsa pomonella L.) 



For the past 2 years, bait traps have been used in the Bitter- 

 root Valley for timing the sprays for the codling moth. During 

 the 1937 season the moths were few throughout the most of the 

 Valley, being most abundant northeast of Stevensville. Here 

 the largest number collected from one trap at one inspection 

 was 13. Cover sprays were timed by these trap collections by 

 many of the growers. In 1938 there was a pronounced in- 

 crease in trap collections. This increase was rather general, at 

 least from west of Hamilton to Stevensville where the greatest 



Figure 10. — Codling moth bait trap, Bitterroot Valley, 1937. 



