124 



DECIDUOUS FRUIT INSECTS AND INSECTICIDES. 



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

 of each plat. Siloam Springs, Ark., 1909 — Continued. 



PLAT V. UNSPRAYED— Continued. 





Number of larvae for each tree. 



Total 



for 



plat. 



Percent- 

 age of 

 larvae by 

 broods 

 entering 

 at calyx, 

 side, and 

 stem. 



Total 



larvae, 



first and 



second 



broods. 



Brood and place of entrance. 



Tree 9. 



Tree 10. 



Tree 11. 



Tree 

 12. 



Tree 

 13. 



First brood: 



Calyx 



31 

 9 

 2 



258 

 36 

 12 



55 



19 



4 



63 



23 



1 



133 

 33 

 11 



1,088 



254 



74 



76.84 

 17.94 

 5.27 





Side 





Stem 









Total 



42 



306 



78 



87 



177 



1,416 













Second brood: 



Calyx 



489 

 98 

 28 



458 

 89 

 11 



535 

 81 

 29 



398 



94 

 29 



353 1 5,471 

 96 1,056 

 15 | 283 



80.34 

 15.51 

 4.15 





Side 





Stem 











Total 



615 



558 



645 



521 



464 fi-810 





8,226 













In the case of the sprayed plats, as would be expected, the propor- 

 tion entering at the calyx is greatly reduced, and there is a corre- 

 sponding increase in the proportion entering the fruit at the side, 

 owing to the lesser efficiency of the spray at the latter place. This 

 is shown for each of the plats in Table IV. 



Table IV. — Places of entering apples, shown in percentages, of total larvae of first and 

 second broods of the codling moth combined. Siloam Springs, Ark. , 1909. 





Percentage of larvae entering — 



Total 



larvae, 



first 



brood. 



Total 

 larvae, 

 second 

 brood. 



Total 

 larvae, 



Plat No. 



Calyx. 



Side. 



Stem. 



Total 



first and 

 second 

 broods. 



I. One-spray, Bordeaux nozzles 



III. One-spray, Vermorel nozzles 



IV. Demonstration 



15.96 

 33.01 

 54.81 

 79.73 



75.38 

 57.39 

 41.93 

 15.93 



8.66 

 9.60 

 3.26 

 4.34 



100.00 

 100. 00 

 100.00 

 100. 00 



26 



25 



22 



1,416 



3,158 



2,641 



592 



6,810 



3,184 



2,666 



613 



V. Unsprayed 



8.226 







As between the several sprayed plats there is considerable variation 

 in the number of apples wormy at calyx, side, and stem, which is of 

 significance in connection with the character of the treatments given. 

 To compare these points better Table V has been prepared. 



Table V. — Efficiency of the one-spray and demonstration treatments as shown by the 

 percentages of wormy apples. Siloam Springs, Ark., 1909. 



Plat No. 



Percentage of wormy apples.a 



Total 



number 



of wormy 



apples/ 



Total 

 number 



Calyx. 



Side. 



Stem. 



Total. 



of 



apples. 



I. One-spray, Bordeaux nozzles 



1.18 



3.32 



1.03 



26.85 



5.54 



5.57 



.79 



5.36 



0.64 

 .97 

 .20 



1.46 



7.24 



9.97 



1.88 



33.26 



3.120 



2,654 



607 



8,120 



43,152 



IU. One-spray, Vermorel nozzles 



26.534 





32,451 





24,428 











a As some apples were entered at more than one place, the sums of the percentages for calyx, side, and stem 

 slightly exceed the total percentages of wormy apples. 



