18 NEW YORK STATE MUSEUM 
the percentage of wormy apples was excessive. The selected data, 
which are believed to be more nearly representative, are given below. 
Codling moth, Mead orchard, 1918 


CODLING MOTH 








NO. OF TOTAL | PER- LEAF 
ea TREE Sane || sien 1) SONS | yey h) Gena ail 
: al- 
End | Side | Aug. es 
Oneicen ce. Dae ern ek (065) 4o2 I 109 IIs (0) 28 0) 127 
Per cent..} ..... 84.20 .06 6.54 OLso Waa wel ea 681. ek 62 
Oneren er Be oe 3 446 | 2 806 161 180 213 ts) 52 7 154 
Pericenteniiese aes 84.03 4.67 §.22 62181) 1) He creser | e2on|A46 
Totalessc accel csiteeiige ae 5 III | 4 298 162 289 SOSH shan 80 7 281 
Pericenttte kile tes sate iae oer 84.09 Sys 5.65 Te ZOE chee tes 13 | 5.49 
Pwo tei Ae e2nOO8, || hL708 2 139 162 to) 6 I 155 
Pericent.c|pe. ae 85.98 .09 6.64 TeTAy || Vales A2 Sill pe OAnl 7 /arax 
DWOzK tH 245. CR ae 4A On ete 7, 8 123 130 Ca) 5 0 122 
Percent alte ciee 78.02 -54 8.36 SESAaiine we SAU eon On2o 
FEWOeiamcetoss iD eee 2 858 | 2 541 21 192 304 I 28 2 273 
Pericenten| eine 88.90 a7 6.71 | 10.63 .03 £97 || 00) |,On55 
Totals cbkvsc cll lh eieiceteciee 6 419 | 5 486 31 454 596 I 42 3 550 
IPETiCenGr eel alLcrcrorere te coral umees ghee 85.46 .48 7.07 OSZOnl ere. ~OSu|usser || Sa50 
TAT EC Sees oc sroyes Asante 3 179 | 2 726 88 146 236 te) 25 fe) 211 
Per/centcn| ie. cre 85.75 2.706 4.59 TEA aa aes S780 |Meat en tOrOs 
Three (CO eacoocal) ute || ky} 7 79 124 (a) II to) 113 
Renicententinetjetere 87.84 -41 4.68 ASS MMe posts <O50)|eira cal OnGo 
AnhTees 5. ee IDAs I 930 | I 638 6 98 195 te) II I 183 
Pericentualltassine 84.87 ast Si O71 eLO LOUIS ek -56 | .05 | 9.48 
Abby Wamemior IDcaddonc dll G 2R3 1) 203 13 138 I3I to) 7 oO 124 
Pericenten|menen. 88.58 -53 5.62 Seah cuvde 2801) 20. S05 
MO tas acdagelsy cell aeseralcueisvolecs 9 248 | 8 o18 II4 461 6501) 2n-5 54 I 631 
PEriGentajacs cata ce eretaieicnall ie eve ocd 86.83 E23 4.98 WIOOU Ms kee = 58a) pte e el AOrod 
NON’, . sissies > CEES 4 783 | 3 967 104 2904 438 5 49 3 381 
IRencentealwecie 82.93 27 4.14 9.15 -I0 | 1.02 | .06 | 7.96 
None): LF. Y........] 4 582 | I 940 | 2 096 245 484 58 68 ts) 358 
Pericentsia|) seme 42.33 | 45.74 SEA TONSO als Tai2O) eX va Sil wera RTO 
Total <2 Aasicci| sto cvtertee 9 365 | 5 907 | 2 200 539 922 63 117 3 739 
Rercentyce delice Wes al) westecee 63.07 | 23.49 Ses 9.84 67 | 1.24 03 | 7.89 
Examination of the above table shows first of all the progressive 
increase in the percentage of perfect apples in plots sprayed once, 
twice and three times and a markedly smaller per cent on the check 
trees. There is a marked difference between the amount of scab 
on the check trees and those which were sprayed and a considerable 
variation between the plot sprayed once and the two receiving more 
than one treatment, though for some cause or other plot 3 had a 
higher percentage of scabby fruit than the one sprayed twice. It 
is one of the anomalies which can not be readily explained. It will 
be noted that leaf roller or white-marked tussock moth injury to 
fruit, probably both, was not materially affected by any of these 
treatments. Codling moth infestation was much less in this orchard 
than last year, the percentage for the two check trees, 9.84, falling 
far below the 41.69 per cent of wormy fruit found in 1917 on the 
unsprayed trees in this orchard. The relatively light infestation 
