2A NEW YORK STATE MUSEUM 
yield of the two Baldwin trees. Nevertheless, it will be seen that 
there is a fairly close comparison between the results obtained upon 
these different varieties in the same plot, subjected as near as might 
be to similar treatment, except that in the case of scab infection a 
considerably higher percentage, namely, 25.40, of the Baldwins were 
infected, whereas the greenings showed but 14.27. This is very 
probably due to variation in the preblossoming spray. A reverse 
condition obtains in relation to leaf roller, there being 7.74 per 
cent affected on the Baldwins and 17.44 on the greenings. The 
average percentage of wormy fruit for the two varieties is almost 
identical. There is no marked difference in the end wormy, the 
difference between none on the greenings and but .16 on the Baldwins 
being so slight that we can hardly attach special significance thereto. 
There is a little, though not marked, variation in the percentage of 
side July, ‘shallow’ and side August. In fact, the parallelism 
is so close that one might conclude that the two varieties were 
practically equally susceptible to codling moth injury. 
Barker orchard, checks (unsprayed) 1917 


CODLING MOTH, WORMY 










TOTAL | PER- LEAF ee 
TREE FRuIT | FEcT | SCAB | ROLLER 
Side Shal- Side 
Total | End July low | August 
Warten ters a ovett 590 roo Sis Si: 319 52 84 156 60 
Bercentsej els crreietel||. © serene 16.95 | 53.00 5.25 | 54.06 8.81 | 14.23 | 26.44 10.17 
BN Hate Seteise = lek. L4O 425 377 109 406 96 170 176 81 
IPEmcentectenmetste|| ne crele 36.99 | 32.81 9.48 | 35.33 8.35 | 14.80 | 15.32 7.04 
Motalemercyta.- I 739 525 690 140 725 148 254 332 I41 
Pericent<.< ster tell) cisiere © 30.18 | 39.67 8.05 | 41.69 8.51 | 14.60 | I9.10 8.11 

The two check or unsprayed trees show a marked contrast to the 
experimental plots. Attention should first of all be called to the 
fact that in selecting these trees practical considerations led to the 
choosing of those with a moderate or smal! crop and as a consequence 
the percentage of infested apples would very likely be higher. Never- 
theless, there is a marked contrast between the 54.06 per cent of 
wormy fruit on tree Y with its total yield of 590 apples and 14.64 
per cent of wormy fruit on tree E of plot 3 with a yield of only 437 
apples. Similarly tree X with its 35.33 per cent of wormy fruit in 
a total yield of 1149 apples contrasts strongly with the 13.95 per 
cent of wormy fruit on tree D of plot 1 with its crop of 1139 apples. 
