62 



N. H. AGR. EXPERIMENT STATION 



[Bulletin 143 



ing given for the codling moth aids in the control of the plum 

 curculio, as will keeping the drops picked up and cultivating the 

 orchard. 



The aggregate annual loss to New Hampshire fruit growers 

 through the work of the codling moth is hardly appreciated, as 

 most of the wormy fruit drops and is not observed, but careful 



Fig. 2.— Apples scarred by the Plum Curculio. 



observations both by this Station and by fruit growers show a 

 loss of full}^ one-third the total crop, which would be equivalent 

 to an annual cash loss of at least one-quarter of a million dollars. 



I. LIFE HISTORY. 



Successful control of a pest of so great economic importance 

 must be based upon a thorough knowledge of its habits, and 



exhaustive studies of every 

 phase of the life of the insect 

 have therefore been made dur- 

 ing four years. 



How the Winter Is Passed. 



Examine the bit of apple bark 



on which a woodpecker has been 



picking and you will doubtless 



find that a clean hole has been 



drilled through it and directly 



into a small, white cocoon, now empty, for no one knows the 



winter home of the codling moth so well as its worst enemy, the 



woodpecker. Usually the apple worm forms its cocoon under the 



Fio. 3. — The apple worm in Its winter 

 home, the cocoon under a bit of bark. 



