BEETLES IN ORCHARDS. 
121 
indicate a very early movement of the beetles for that locality, 
though no more were taken until May 9, more than three weeks later. 
Activity of the insects did not properly begin until May 21, after 
which date, with the exceptions shown, they proved to be fairly 
uniform in numbers up to July 2; after the latter date few were 
captured. A total of 381 individuals was taken during the period, 
an average of 5 and a small fraction per tree. 
Table LXIX. — Jarring record of the plum curculio on peach. North Ea.st . Pa.. 1910. 
Dates of jarring. 
Number ! 
of beetles ' 
caught. I 
Weather condi 
tions. 
Number 
Dates of jarring. of beetles 
caught. 
Weather condi- 
tions. 
Apr. 1.5 
21 
3 
22 
26 
23 
Mav 2 
4 
6 
9 
7 
11 
13 
1 
10 
19 
21 
19 
23 
22 
2G 
22 
23 
1 
30 
19 
June 2 
4 
4 
13 
6 
6 
8 
4 
10 
31 
13 
13 
15 
19 
16 
37 
18 
19 
Cloudv. 
Do. 
Fair. 
Cloudv. 
Fair. 
Foejrv. 
Clear. 
Do. 
Cloudv. 
Do. 
Clear. 
Do. 
Do. 
Partlv cloudv. 
Do. 
Clear. 
Do. 
Cloudy. 
Fair. 
Partly cloudv. 
Clear! 
Partlv cloudv. 
Do. 
Clear. 
Partlv cloudv. 
Clear. 
June 20 
22 
2.5 
27 
29 
July 2 
20 
2* 
22 
26 
2.5 
21 - 
27 
n 
29 
18 
2 
...1 12 
3 
9 
11 1 
13 
16 
19 
Clear. 
Do. . 
Do. 
Cloudv. 
Clear. 
Do. 
Do. 
Cloudv. 
Clear." 
1 Partlv cloudv. 
Do. 
Clear. 
Do. 
23 Partlv cloudv. 
26 Do. 
29 Clear. 
Aug 2. 
5. 
11. 
16. 
22. 
26. 
30. 
Sept. 2. 
Total. 
Do. 
Partlv cloudv. 
Clear! 
Do. 
Fogey. 
Partlv cloudv. 
Do. 
Do. 
In the jarring records obtained during 1910, at Douglas. Mich., a 
block of 70 peach trees was used, and the number taken on each row 
at each jarring was separately recorded. Row Xo. 1 was adjacent 
and parallel to a piece of woodland, the influence of which is evident 
by the larger number of insects taken early in the season from the 
first two or three rows. After about June 9 the beetles were uni- 
formly disseminated over the whole block. From May 4 to 10, a 
total of 5 beetles was secured and from May 13 to 19, a total of 20. 
From the last date they put in an appearance rapidly, showing for 
the period from May 24 to 28 a total of 240. The beetles were in 
maximum abundance during June, which month yielded 1,468, or 
59 per cent of the total for the season. The insects, nevertheless, 
were quite generally present all through July and August. None 
was taken after August 31. though j airings continued until Septem- 
ber 19. (See Table LXX.) 
