114 
THE PLUM CURCULIO. 
buds in 1904 were expending about May 3, trees were in full bloom 
May 10, and the blossoms had fallen by May 15. As compared with 
the condition of the trees, in 1904 the beetles were in evidence about 
two weeks earlier than in 1903. 
Some data have been obtained on this point by the Bureau of 
Entomology. In 1905 records were made by Mr. Johnson, at 
Youngstown, N. Y., (see Table LIX) and though jarrings were a little 
late, the results are of interest as showing the occurrence of insects 
with reference to the condition of the trees. 
Table LIX. — Time of appearance of plum curculio on trees in spring. Jarring records, 
Youngstown, N. Y., 1905. 
Dates trees 
Japan plum. 
Domestica 
plum. 
Peach. 
Pear. 
Condition of trees. 
jarred. 
Trees. 
Cur- 
culios. 
Trees. 
Cur- 
culios. 
Trees. 
Cur- 
culios. 
Trees. 
Cur- 
culios. 
May 11 
12 
50 
25 
25 
25 
50 
25 
25 
25 
15 
25 
25 
1 
9 
34 
1 
39 
9 
8 
6 
30 
26 
32 
25 
50 
2 
6 
25 
25 
25 
25 
25 
25 
25 
25 
15 
25 
25 
1 
1 
1 
»' 
4 
2 
15 
Japan and Domestica 
plums in full bloom. 
16 
17. 
25 
50 
25 
25 
25 
15 
25 
4 
23 
12 
7 
2 
11 
15 
25 
19 
22 
24 
27. . 
25 
25 
25 
2 
1 
Pears in full bloom. 
Plum blossoms fallen. 
30 
Peach and pear blossoms 
fallen. 
2 
2 
First egg punctures seen 
on apple and plum. 
Total 

195 
82 
15 
3 
Also, similar data were secured by Mr. Johnson at North East, Pa., 
in 1906, as shown in Table LX. 
Table LX. — Time of appearance of plum curculio on trees in spring. Jarring records, 
North East, Pa., 1906. 
Dates trees 
Sweet cherry. 
Sour cherry. 
Apple. 
Domestica 
plum. 
Condition of trees. 
jarred. 
Trees. 
Cur- 
culios. 
Trees. 
Cur- 
culios. 
Trees. 
Cur- 
culios. 
Trees. 
Cur- 
culios. 
Apr. 30 
25 
Cluster buds of apple 
just opening. 
May 2 
50 
25 
50 
8 
25 
50 
50 
50 
1 
1 
6 
25 
8 
Sweet cherry and plum 
14. . 
25 
25 
25 
25 
trees in full bloom. 
16 
25 
1 
17 
1 
25 
25 
25 
17 
7 
7 
Sour cherry in full 
20 
25 
25 
bloom. 
28 
First egg punctures on 
plums, pears, apples, 
and cherries seen May 
24. 
Total 
1 
39 
58 
1 
