CONTROL OF THE CODLING MOTH IN NEW MEXICO. 5 



It would appear that with the minimum of three applications, 

 made as shown in Table I, injury from the codling moth in the Pecos 

 Valley may be reduced to less than 5 per cent of the total crop of 

 apples produced. For each of the two additional applications an 

 increase in sound fruit is shown, but probably not in proportion to 

 the expense involved. It should be borne in mind, however, that in 

 these experiments applications were made with much thoroughness, 

 and unless the orchardist will do equally as thorough work it will be 

 better for him to make the additional applications. 



PLACES OF ENTRANCE OF FRUIT BY CODLING MOTH LARVAE. 



Many observations in different parts of the country have shown 

 that the majority of codling moth larvae normally enter the apple at 



Fig. 3.— Showing condition of calyx lobes of Ben Davis apple: o, Two days after falling of petals; b, ten 

 days after falling of petals. (Original.) 



the calyx end. A careful study of the places of entering sprayed 

 fruit by larvae, whether at calyx, side, or stem, throws much light 

 on the relative effectiveness of the respective spray applications. 

 All experiments corroborate the statement that the treatment given 

 immediately after the falling of the petals is by far the most im- 

 portant one and that its omission can not be corrected by subsequent 

 treatments, however thoroughly made. 



A study of the behavior of the calyx lobes of the recently set 

 apples in the Roswell section furnishes evidence of value in timing 

 spray applications. Ordinarily in the East there is a period of about 

 10 days following the dropping of apple blossoms during which the 



