REPORT OF THE STATE ENTOMOLOGIST igi6 1/ 



INJURIOUS INSECTS 



CODLING MOTH 

 ( arpocapsa pomonella Linn. 



The experimental work of last year, with particular reference to 

 the serious injury caused by the codling moth in the western part 

 of the State, was continued the past season, in cooperation with the 

 Bureau of Horticulture of the State Department of Agriculture, and 

 also with the Monroe county farm bureau. The orchards selected 

 for the experiments were located through the courtesy of Messrs 

 A. B, Buchholz of Albion and L. F. Strickland of Lockport, both 

 agents of the State Department of Agriculture, and of Mr L. A. 

 Toan of Rochester, manager of the Monroe county farm bureau. 

 An effort was made, as last year, to secure orchards which promised 

 a fairly good and uniform crop, and in the main we were successful 

 though vagaries in setting of the fruit gave somewhat different yields 

 from what was anticipated in some instances. 



Satisfactory orchards were located in Monroe, Orleans and Niagara 

 counties, and through the courtesy and cooperation of Messrs Fred 

 W. Curtis, Hilton; H. E. Wellman, Kendall; A. G. Snyder, Albion; 

 and G. H. Stahler, Newfane, every facility was placed at our dis- 

 posal, these gentlemen agreeing to spray in substantial accordance 

 with the plan of last year. In each case the man and the equipment 

 on the place were used, the Entomologist supervising the operations. 

 There were twenty experimental trees in each orchard, a few pro- 

 ducing good crops, so that the manual labor involved in the actual 

 sorting and classification was by no means small, and acknowledg- 

 ments are due Messrs Toan, Buchholz, Strickland, L. H. Spooner 

 and J. B. Achilles for assistance in the classification of the fruit in 

 the orchards, the two last named aiding in the grading of the apples 

 from all four experimental orchards. 



Life history and habits. Before giving the details of the experi- 

 mental work, the life history of the insect may well be outlined, 

 since a knowledge of its habits is essential to satisfactory control 

 work. The codling moth or apple worm winters in a tough, silken 

 cocoon usually located in an oval cell under the rough bark of trees. 

 The caterpillars transform to brown, apparently lifeless pupae in 

 late April and early May, and the moths commence to emerge and 

 continue to appear throughout the greater part of June. Cool 

 evenings, that is a temperature below 6o°, may delay egg laying 

 considerably, which appears to be a somewhat important factor in 



