316. Report oF THE DEPARTMENT OF ENTOMOLOGY OF THB 
number of the trees which had not been previously treated for 
this pest showed considerable infestation upon some of their 
branches. | 
Conditions.—The trees were sprayed May 2-7. The weather 
during the application of the mixtures was fair. In many cases 
the buds had already burst, and in some instances the leaves 
were well out, while in others only the tips of the young leaves 
- were beginning to appear. At this time the aphids were hatching 
and making their appearance in the leaf clusters. 
Results on aphis.—On April 14 the trees selected for treatment 
and for the checks were examined to ascertain the relative num- 
bers and the distribution of the eggs of the aphis upon them. 
Notwithstanding the abundance of this insect in the orchard 
during the preceding summer, very few eggs had' apparently been 
deposited and it was only with careful searching that specimens 
were found. The extent of the infestation of the trees was ap- 
parently the same for both lots. On May 1 the young lice 
were making their appearance in rather surprising numbers at 
the tips of the opening buds. The condition of the trees at this 
time with respect to the aphids is shown by the following table 
which is based upon an examination of a number of buds chosen 
at random: 
TABLE XI.—CoNnpDITION OF APPLE BUDS WITH RESPECT TO APHIDS. 

BUD NO. Aphids to bud. Bud No. Aphids to bud. 
No Noe 
1 2 26 ri 
2 2 Wg I, 
3 1 28 2 
4 4 29 6 
5 v 30 0 
6 5 31 0 
tf Z 32 0 
8 8 33 0 
9 10 34 2 
10 2 35 8 
3B 1 36 1 
12 0 37 5 
13 0 38 2 
14 1 39 0 
15 8 40 8 
16 2 41 5 
17 4 42 2 
18 1 43 ve 
19 7 44 5 
20 3 45 2 
21 2 46 1 
22 2 47 0 
23 6 48 0 
24 4 49 1 
25 2 50 Za 
