124 
THE PLUM CTJRCULIO. 
Table LXXI. — Jarring record for the plum curculio on peach, Barnesville, Ga., 
1910— Continued. 
Dates of 
Number of curculios caught, by rows. 
Total. 
jarring. 
Rowl. 
Row 2. 
Row 3. 
Row 4. 
Row 5. 
Row 6. 
Row 7. 
Row 8. 
Row 9. 
Row 10. 
Sept. 23 
27 
1G 
3 
8 
1 
3 
13 
5 
3 
2 
1 
2 
4 
1 
1 
1 
2 
1 
3 
2 
1 
..... 
2 
32 
9 
30... 
1 
11 
Oct. 4... 
1 
4 
7... 
5 
11... 
1 
2 
1 
21 
15 
18 
22 
Total. 
3,197 
975 
641 
393 
269 
229 
275 
227 
503 
788 
7,497 
A study of this table shows the beetles to have first become active 
March 10, when 16 were taken on row No. 1. During the interim 
March 18 to 23 they began to appear in numbers, and were out in 
full force during the last week of March. Considering the results of 
jarrings from the individual rows, the influence of the woods as 
hibernation quarters is very plainly shown. Thus, up to March 23 
rows Nos. 1 and 2 gave a total of 476 beetles, as against 61 from the 
other eight rows. By March 25, 15 da}^s after emergence began, 
diffusion of the beetles had become quite general over the block, 
though the number taken from the first row on a given date was in 
most cases in excess of that taken from any other single row. For 
the season, row No. 1 yielded 3,197 beetles, 42.64 per cent of the whole 
number captured. From the first three rows adjacent to the woods 
a total of 4,813 individuals was taken during the season, or 64.19 
per cent of the total. The influence of the grass-covered terrace 
between rows Nos. 9 and 10 is also evident, more insects being captured 
from each of these than from any one of the rows Nos. 4 to 8. The 
beetles were in maximum abundance in the orchard from about 
March 25 to April 13, during which period 4,108 individuals were 
taken, or 54.79 per cent of the total. 
The appearance of the new generation of beetles is marked by a 
sudden increase in the jarrings for June 7 and several days subse- 
quently. Beginning with the third week in August an increase in 
the number of beetles taken is again noted, reaching its maximum 
about September 2. This may doubtless be attributed to the issuing 
of the beetles that developed from ripening fruit, the ripening period 
being approximately July 7-20. 
No beetles were captured in this orchard after October 11, though 
the jarrings were continued to October 26. But during late fall 
jarrings were made in other orchards, both sprayed and unsprayed, 
and also in woods adjoining peach orchards. After beetles ceased to 
appear on the regular jarred plats, many were taken in some of these 
