THE PECAN NUT CASE-BEAEEB 
OTIP05ITIOX AND LENGTH OF INCUBATION PERIOD 
It was very difficult to get moths to oviposit in coiiflnement. 
From material under observation it was determined that a period 
of from 2 to 7 days elapsed from the time of emergence to the time 
of first oviposition. The moths confined in cages usually deposited 
all eggs within a period of 3 days. In confinement moths deposited 
eggsindiscrimiriately upon the nuts, leaf petioles, foliage, and occa- 
sionally on the sides of the glass breeding jars. It seems that under 
natural conditions egg deposition invariably takes place on the 
nuts at the calyx or on the side immediately under the calyx lobes. 
As is shown in Table 3, the average length of the period of incu- 
bation of 56 first-brood eggs was found to be 9.48 days, the maximum 
being 10 and the minimum 7. 
Table 3. — Length of incubation period of first-brood eggs of the pecan nut case- 
bearer, Monticello, Fla,, 1917 
Number 
of eggs 
from 
which 
larvae 
Date of 
oviposition 
Date of 
hatching 
Length of 
incubation 
period 
emerged 
29 
26 
1 
May 11.. _ 
13... 
15.. _ 
May 21.. . 
22.. _ 
22... 
Days 
10 
9 
7 
The length of the incubation period for second-brood eggs is given 
in Table 4. 
Table 4. — Length of incubation period of second-brood eggs of the pecan nut case- 
bearer, Monticello , Fla., 1916 and 1917 
1916 
1917 
Number 
of eggs 
from 
which 
larva? 
emerged 
Date of 
oviposition 
Date of 
hatching 
Number 
Length [ of eggs 
ofincu- \\ from 
bation ! which 
period \\ larvae 
1 emerged 
II 
Date of 
oviposition 
Date of 
hatching 
Length 
of incu- 
bation 
period 
11 
June 26 
July 1 
Days 
5 
6 
6 
6 
5 
7 
4 
5 
6 
41 
14 
6 
45 
12 
2 
3 
13 
July 1 
Days 
6 
3 
do 
July 2 
do 
JulyS 
Julv 8.... 
4 
June 27 
June 2S 
July 3 
do 
July 14 
do 
do 
Julv3 
Julv 10... 
Julvll 
Julv 12 
do 
July 13 
do.. 
5 
1 
Julv 4 
do 
do 
July 6 
do. 
July 7.. 
6 
8 
Julv 8 
1 
8 
9 
2 
Julv 10 
July 18 
July 19 
Julv 20 
6 
7 
6 
Av 
erage for 47 indh 
iduals 
5.09 
Average for 136 inc 
ividuals.. 
6.17 
Observations on a limited number of third-brood eggs hatching in 
August showed that the period of incubation ranged from 4 
days, the average being 4.95 days. 
