SPRAYING FOR CURCULIO ON APPLE. 195 
EXPERIMENTS IN WESTERN NEW YORK AND NORTHWESTERN PENNSYLVANIA. 
Results of demonstration spraying for apple insects and diseases 
in western New York (Westfield) and northwestern Pennsylvania 
(North East) as bearing on the control of the curculio are given in 
Table XCVI. In the Westfield work the average percentage of apples 
uninjured by the curculio from the 5 sprayed Baldwin trees used 
for counts was 91.07, as against 76.21 on the 5 unsprayed count 
trees, the average number of punctures per fruit for the former 
being 0.08 and for the latter 0.237. 
In the case of Duchess trees at North East, Pa., notably better 
results are shown, which may in part be due to the earlier picking 
of the fruit of this variety, as avoiding late feeding punctures by the 
beetles. The 3 count trees of the sprayed block showed 79.04 per 
cent sound fruit, as against 25.44 from the 3 unsprayed count trees, 
a difference, in favor of two applications of poison, of 53.60 per cent 
of the crop. (See Pl. XV). 
TaBLeE XCVI.—Results of spraying apples for the plum curculio. 
WESTFIELD, N. Y., 1908. 
Total 5 Average 
Plat Tree | Total | number Beene: percent- 
No Treatment. Variety. No number | of apples Bee age of 
7 * |ofapples| punc- Si es sound 
tured. pp apples. 
Four applications Bordeaux mix- ; MY oS oka a 2 Ge ete 
I... ture (4450) plus 2 pounds |l pa jawin 3 3, 380 240 rp Ne ak 
arsenate of lead: May 6, May |{f “~~ >> >*>> 4 1204 156 ZACH |e Nee 
27, June 8, June 27. 5 | 2/829 207| 92.60|.......... 
11, 427 O21GU S. eee Se 91.07 
1 748 191 TASAO) toe cle mae = 
2 1,518 309 79s GON seen cs 
MiSes.|| Unsprayed x. \cntne-e> oaeince se ece esos. G ean 3 862 181 79:00) | sae Ses 
4 1,100 212 80: 80)|ss-o-62--~ 
5 838 312 Priel eee ee 
5, 066 ADA NG}s| oe eee 76. 21 
NORTH EAST, PA., 1906. 
Two applications Bordeaux mix- SKS 1 802 156 SOLO4ofee he ces 
aso? | ture (4-450) plus 2 pounds peice Old 2 541 iy HEL 9 is [ae Sa 
arsenate of lead: May 24, June 7. 5° 3 370 49 tS ay fe ae eee 
1,713 61S Ree anaes 79. 04 
1 647 473 26589 eeeciciee 
PeameWUTSUTAVE . S22 5. - 2b facies. e853 eee. GOrss eee 2 268 223 WGAGn eae cote 
ics 146 95 SY ASH pee pene 
1,061 TOls| ones eae 25. 44 
