ONE-SPRAY METHOD FOR CODLING MOTH, ETC. 143 
Similar comparison may also be made from the data from Arkansas. 
Thus, on the unsprayed plat (V) for each first-brood larva there were 
4.8 second-brood larve. On Plat III (one spray) for each larva of 
the first brood there were 105.6 larve of the second brood. Plat I 
(one-spray method) shows for each first-brood larva 121.5 second- 
brood larve. 
To show the comparative efficiency of the demonstation and one- 
spray treatments in preventing infestation at calyx, side, and stem, 
Table XXII is presented. 
TaBLE XXII.—Eifficiency of the one-spray and demonstration treatments as shown by 
the percentage of wormy apples. Saugatuck, Mich., 1909. 
Percentage of wormy apples. Total 
number Total 
Plat No. ] == Te See of wormy| number 
Calyx. | Side. Stem. Total. apples. of apples. 
| 
Per cent. | Per cent. | Per cent. | Per cent. | 
PSO MSDIAV EO. Soca c-2soes es esisecee ase 13. 98 7. 67 | 0. 62 22. 20 8, 409 37,875 
His EmOnSirahOl= s=s5 620 ee eee oat -09 2.92 -O1 2.33 998 42,818 
TO nespravers see a2 oes. asa = -13 7.05 - 09 6.36 2,738 | 42, 867 
| | 
a Kach entrance was counted in determining the percentages for calyx, side, and stem, so that the sum 
of these percentages exceeds the total percentage of wormy fruit. 
It is here seen that the two methods of spraying were about equally 
effective in preventing entrance at the calyx, and that the one-spray 
method had practically no effect upon side entrance. The demon- 
stration treatment saved a total of 4.03 per cent of the crop more 
than the one-spray, practically all of this saving being due to the pre- 
vention of side entrance. But, as in all the other experiments, the 
demonstration treatment failed to reduce side entrance to anything 
like the same degree that calyx entrance was prevented. 
THE PLUM CURCULIO. 
The effects of the applications of sprays on the plum curculio in the 
KE. H. House orchard are shown in Table XXIII. 
TasLey XXIII.—Injury by the plum curculio for entire season, Plats I, II, and III. 
Saugatuck, Mich., 1909. 
PLAT I. UNSPRAYED. 
Number of punctured and sound apples, etc., per tree in 
each plat. 
Tree Tree Tree Tree Tree Tree Tree 
1 3. 4 7 9. 10 13 
ING) aaa SE Ee a a ee en 1,452 422 506 505 | 1,078 756 141 
No sini punctimed!: 2225 Aro a 866 214 220 241 480 372 56 
NOM SOUMNCiIn UNG pes sane wR epee | Seiden) Oyo Mla So, Gore Leeo ||, anon li eo 2,573 
INOS Wb int Ser ae ae oe ee ee es Se 45659) &,785 | 3,552°| 35506 | 2)751 | 3,883 2, 629 
Per cens fave fromh injury sce. 2225 85--.2 52225. 81.41 | 96.30] 93.81 | 83.99} 82.55] 90.42 97. 87 
