ONE-SPRAY METHOD FOR CODLING MOTH, ETC. 143 
On all plats a greater percentage of larve of the first brood entered at 
the calyx than was true of larvee of the second brood. Thus, on the 
unsprayed plat (I), 85.20 per cent of the first-brood larve entered at 
calyx as against 50.45 per cent of second-brood larve. On Plat II 
(demonstration) 20.95 per cent of first-brood larve entered at calyx 
end as compared with 0.52 per cent of second-brood larve, while on 
Plat III (one spray) 7.38 per cent of first-brood larvee entered at calyx 
and 1.30 per cent of second-brood larve entered at this place. In 
comparing Plats II and II] a reduction of first-brood larve entering at 
calyx is noted in favor of the one-spray method of 13.57 per cent— 
7.38 per cent as against 20.95 per cent. 
In the case of second-brood calvx-entering larve, however, the 
difference is in favor of the demonstration plat (II), though in both 
plats the percentages of total larve entering the fruit at calyx is very 
small. Many interesting deductions may be drawn from tables of 
this character, which, however, are plainly evident to the reader. 
Attention, nevertheless, should be called to the ratio of increase of 
larve between the first and second broods. On Plat I (unsprayed), 
for every larva of the first brood there were 1.82 second-brood larve, 
whereas on Plat Il (demonstration) and Plat III (one spray) for each 
larva of the first brood there were 7.7 and 10.5, respectively, of the 
second brood. 
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 larvee. 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. 
THE PLUM CURCULIO. 
The effects of the applications of sprays on the plum curculio in the 
KE. H. House orchard are shown in Table XIX. 
TaBLE XIX.—IJnjury by the plum curculio for entire season, Plats I, II,and III. Sauga- 
tuck, 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. aan || ike 9. 10. 13. 
NOs PUNCHINES =5- <2. cee nesecesas aa ec aes 1, 452 422 506 505 | 1,078 756 141 
NON IRON UNChUne soe saccein ee Moonee ee 866 214 220 241 480 372 56 
NGO MSOUME MEU Pe o5ae= woe sl- ene eee eeee see 3 3,793 | 5,571 | 3,332) 1,265) 2,271] 3,511 2,573 
NOMINUM er Soca see ose eeecceecemas cence 4,659 | 5,785 3,552 1,506 | 2,751 3,883 2,629 
Ber Cent mee droul InjULY, ~ =o. 52 sem eee tone 81.41 | 96.30] 93.81 | 83.99 82.55 | 90. 42 97.87 
