LIFE HISTORY AND HABITS: THE LARVA. 
61 
larvse recorded, but for uniformity the estimated number of larvse 
from the fruit from the 31 trees is used in the table. 
In Michigan the drop and picked fruit from 15 peach trees was 
used, collections beginning June 30 and continuing to August 27. 
These records, it is believed, should show the normal seasonal 
history of the insects in this stage under orchard conditions. Such 
WO 
/soo 
/250 
/OOO 
750 
SOO 
%250 
I 
\ 
2 9 /6 23 30 6 /5 20 27 4 tT ■ /O 2f / 3 'S 
--—.^ 
1 
, / 
\ 
V 
\ 
\ 
\ 
i 
X 
\ 
\ 
\ 
\ 
1 
A 
\ 
\ 
\ 
\ 
7 
i \ 
\ 
/ 
s 
r 
^ 
SSgjg 
!>/zz^ 
G*„/3 
'O 
<§£.d!& 
X.t/90& 
S* 
'^v, \. 
\ 
\ 
^ 
%0> 
---""' 
500 
750 
/OOC 
/250 
1500 
1750 
\ 
1 
^->. 
4y 
y 
\ 
/ 
\ 
c 
i 
\ 
1 
0>^ 
\ 
i 
- 
Fig. 20.— Diagram showing normal emergence from fruit of larvae of plum curculio during season 
at Siloam Springs, Ark., Barnesville, Ga., Washington, D. C, and Douglas, Mich. (Original.) 
records are evidently much more reliable than those winch do not 
take account of all of the fruit for the season. 
In Table XXII are shown the totals emerging for each of the 
four localities by days, as also the number and percentages of larvae 
emerging by months. 
These same data, summarized by weeks, are shown graphically in 
figure 20. 
