20 BULLETIN 969, U. S. DEPARTMENT OF AGRICULTURE. 



In Tables 12 and 13 will be seen the data obtained from examina- 

 tions of the bands and traps. From 56 banded trees 8,805 larvae 

 and pupae, or an average of 157.23, were taken, and from 20 codling- 

 moth traps 3,941 larvae, pupge, and moths, or an average of 197.05, were 

 secured. The destruction of so large a number of individuals should 

 aid gradually in obtaining better control despite the fact that the 

 experimental data for this, the first year, indicate otherwise. 



Part of the orchard of Charles Lamb near Highland Park was also 

 used for the codling-moth trap experiments. This was sprayed by 

 the grower who used the short rod equipped with a Bordeaux type 

 of nozzle in making all the spray applications. In addition to the 

 calyx treatment, six cover sprays were applied. Plat I was sprayed 

 and trapped, plat II was sprayed, and plat III was untreated. 



The results of the fruit examinations of eight trees in each of plats 

 I and II and four trees in plat III are given in Table 14. In plat I, 

 which was sprayed and trapped, 50.54 per cent of the dropped and 

 harvested fruit was free from worm infestation; whereas in plat II, 

 which was merely sprayed, there was 64.54 per cent of uninfested 

 fruit. The unsprayed plat produced 11.45 per cent of fruit free 

 from larvae. 



It will be noted in Table 15 that 5,512 larvae, pupae, and moths 

 were collected from 20 codling-moth traps and that the average per 

 trap was 275.6. 



In the Smith experimental orchard, where the principal spraying 

 experiments of 1917 were conducted, examinations were made of 20 

 codling-moth traps in plat I and of 15 in plat V. The results are 

 . presented in Tables 16 and 17, in which it will be seen that in plat I, 

 6,186 larvae, pupae, and moths, or an average of 309.3 per trap, were 

 secured, while in plat V a total of 4,673 or an average per trap of 

 311.53 individuals were captured. 



