ONE-SPRAY METHOD FOR CODLING MOTH, ETC. 



121 



of apples counted from this plat was 43,152. Plat III received the 

 drenching mist spray with Vermorel nozzle and shows for the indi- 

 vidual trees a range in percentage of fruit free from the codling moth 

 of 83.79 to 91.99, with an average for all trees of 90.03. There were 

 26,534 apples examined. Plat IV, which received the demonstration 

 treatment of five applications, shows a total from the 11 trees of 

 98.12 per cent of fruit free from the codling moth, with a range for 

 individual trees of 96.58 to 99.31 per cent, and the total number of 

 apples counted was 32,451. Plat V (the unsprayed block) shows, for 

 the 13 trees from which counts were made, 66.74 per cent of fruit free 

 from the codling moth, the range being from 53.45 to 78.20 per cent, 

 the total number of apples counted being 24,428. Demonstration 

 plat, No. IV, shows an increase over the unsprayed trees of 31.38 per 

 cent of uninjured fruit and an increase of 5.36 per cent of uninjured 

 fruit over the one-spray block (Plat I). 



The percentages of sound fruit from Plats I and III show very little 

 difference in favor of a coarse spray over a mist spray; that is, 2.73 

 per cent in favor of the former. 



In Table III are shown the places of entrance into apples of the 

 total larvae for the season for each tree of each plat and also the per- 

 centages, by plats, entering the fruit at the calyx, side, and stem. 

 These data have been given in order to show what effect the methods 

 of spraying might have upon the places of entrance into fruit by 

 larvae. The unsprayed plat (Plat V) may be taken to indicate the 

 normal behavior of the larvae and shows that of the first brood 76.84 

 per cent and of the second brood 80.34 per cent entered the apples 

 at the calyx ends. 



Table III. — Places of entrance into fruit by total larvse of the codling moth for each tree of 

 each plat. Siloam Springs, Ark., 1909. 



PLAT I. ONE SPRAY (BORDEAUX NOZZLES). 



Total number of larvse and places of entrance of fruit for each tree, by broods. 





Place of entrance. 



Tree 1. 



Tree 2. 



Tree 3. 



Tree 4. 



Tree 5. 



Tree 6. 



Tree 7. 



Tree 8. 



First brood: 

















1 



Side. 



5 



4 



1 



3 



1 



2 



1 



2 

























Total 



5 



4 



1 



3 



1 



2 



1 



3 







Second brood: 



Calyx 



91 



557 



53 



70 

 400 



48 



69 

 323 



27 



20 



77 

 18 



32 



137 



12 



31 

 172 

 24 



54 

 198 

 34 



55 



Side 



235 



Stem 



25 







Total 



701 



518 



419 



115 



181 



227 



286 



315 







