172 JOURNAL OF ECONOMIC ENTOMOLOGY [Vol. 3 



by the other race, altho these two races show no structural differences. 

 By isolating fruit with limb cages and making use of artificial infesta- 

 tion we hope to get some interesting lights on this problem. It is of 

 immediate practical value because it means danger or no danger from 

 infested wayside or farmyard trees lying near commercial orchards. 



Probably the foregoing will keep us rather well occupied and 

 doubtless other phases will turn up later. 



Some of the members of this association have had experience in 

 working out a problem of this type. We should be very glad to re- 

 ceive from these any suggestions as to what to do and what not to 

 do in our work. 



Mr. Braucher : AVhat is the best method of protecting fruit from 

 this insect, and how can you tell whether the fruit is infested? My 

 experience has been that there is not much indication of infestation on 

 the outside of the fruit. 



Mr. O'Kane: In the case of certain varieties of apple, it is some- 

 times difficult to determine whether or not fruit is infested with this 

 insect, although it is always possible to do so by. critically examining 

 it with a hand lens. 



President Britton : Doctor Felt will now present his paper, en- 

 titled "Spraying for the Codling Moth." 



SPRAYING FOR THE CODLING MOTH 



By E. P. Felt, Albany, N. Y. 



The main purpose of our experiments was to test the relative 

 efficiency of a coarse driving spray, such as that produced by a typi- 

 cal Bordeaux nozzle with a pressure of over 100 pounds, in compari- 

 son with the fine misty spray of the Vermorel nozzle and its various, 

 modifications. 



Comparisons were made between single sprays of each of the above 

 mentioned kinds, applied just after the blossoms fell (plots 1 and 4), 

 between two sprays of each kind, one given just after the blossoms 

 fell and the second just before the sepals closed (plots 2 and 5), and 

 finally between two such sprays and a third applied with a Friend 

 nozzle the last week in July, for the purpose of destroying the second 

 brood of the codling moth (plots 3 and 6). 



These experiments were conducted in a young orchard belonging 

 to Mr. W. H. Hart of Arlington, X. Y., near Poughkeepsie, the first 



