io 
320 REPORT OF THE DEPARTMENT OF ENTOMOLOGY OF THE 
is necessary to determine what effect this exemption would nor- 
mally have upon the succeeding broods. | 
Results on codling moth.—Commencing with October 16, the 
apples were picked and sorted to determine the relative effects of 
the arsenite of soda and the arsenate of lead upon the codling 
moth. This examination was confined entirely to the Baldwins, | 
twenty trees of which variety were selected from each of the two 
kinds of treatment. The results are as follows: 
TaBLe XI[L.—Y1eLtp oF SouND AND WoRMyY APPLES UNDER DIFFERENT TREAT- 
MENTS AT YOUNGSTOWN. 
ATreaks acta orioer Aas YIELD oF PickED APPLES. YIELD oF WINDFALLS. 
TREE TREATMENT. 

Sound. |Wormy.| Total. |Wormy.| Sound. |Wormy.| Total. |Wormy, 




SHOROHONANONWHNWNDOWO ROHAN ROOWNWOWNNWDOANOO 



Secrion IV. No. No. Now =| Per’ cé: No. No. No. | Per-ct. 
Tree 1 2630 42 2672 16 368 98 466 21 
Arsenite of soda...... 2 3532 61 3593 Lee 350 110 460 23 
3 4358 115 4473 2.6 502 119 621 19 
4 4492 105 4597 2.3 583 108 691 15 
5 3572 145 3742 3.9 256 35 291 12 
6 6715 124 6839 1.8 468 45 513 8 
7 3479 33 3512 0.9 266 44 310 14 
8 3086 19 3105 0.6 145 i | 166 12 
9 5193 1833 5266 1.4 420 59 479 12 
10 4362 2k 4383 0.5 225 75 300 ZO 
Tht 2951 alg 2962 0.4 293 45 338 13 
12 3919 iby 3936 0.4 236 44 280 15 
13 5538 oo 5573 0.6 260 62 322 19 
14 5358 54 5412 10 661 81 742 10 
15 2164 14 2178 0.6 136 17 154 11 
16 2522 86 2608 3.38 203 52 255 20 
ips 3371 106 3477 3.0 458 170 528 32 
18 2707 47 2754 i Way; 498 144 642 22 
19 2355 39 2394 LG 400 107 507 21 
20 3907 16 3923 0.4 1019 71 1090 6 
ANVOLALO se oo cis is plaiesiel tele eae rates crt etnaene Dc to Se cal te statete eh le eee 16 
Srcrion IV. 
Tree 1 3629 32 3661 0.9 1468 162 1630 9 
Arsenate of lead...... 2 2480 10 2490 ‘0.4 1600 30 1630 1 
3 5121 34 5155 O27 2790 210 3000 re 
4 5280 30 5310 0.6 2173 62 2235 2 
5 3900 13 3913 0.3 1080 . 65 1145 5 
6 5111 22 6133 0.4 LPVD 50 1165 4 
7 2351 20 2371 0.8 1000 23 - 1023 2 
8 3857 18 2875 0.6 5719 66 5785 1 
9 4424 18 4442 0.4 1630 39 1669 2 
10 1382 8 1390 0.6 855 24 879 2 
11 642 4 646 0.6 565 16 581 2 
12 3913 19 3932 O75 1952 139 2091 6 
13 3837 14 3842 0.4 2538 40 2578 1 
14 4834 10 4844 0.2 1705 20 1725 i 
15 6196 34 6230 0.5 1304 51 1355 3. 
16 3589 10 3599 °0.3 825 35 860 4. 
17: BOSE Vhs ease 2687 0. 1250 12 1262 a he 
18 4042 14 4056 0.3 1612 23 1635 Le 
19 4112 31 4143 On 1836 217 2053 10. 
20 4249 15 4264 0.4 1495 140 1585 8. 
ANT OLOAM OMe crests tie eal Thule ee. ulrtle e's oe HUT eeneneee On Bt Srelctece Mh meet et ereen ea tote 4. 
Sscrion III. 
Tree 1 2772 271 3043 8.9 
Check, no treatment.. .2 1108 106 1214 8.7 
3 1873 268 2141 12.5 
4 1695 193 1888 10.2 
Average....... PL Fe ge as, oie caters emits caters 10.0 

The average percentage of wormy apples (picked) from the 
trees sprayed with the arsenite of soda is 1.5, and from the trees 
