18 DECIDUOUS FRUIT INSECTS AND INSECTICIDES. 
Table V gives the emergence of moths from a quantity of overwin- 
tering material kept at San Jose, Cal. The emergence record is shown 
graphically in figure 6. 
Taste V.—Emergence of moths of the spring brood, San Jose, Cals 1909, from over- 
wintering larve collected on banded apple trees. 
Num- ? Bae Num- 7 Num- Num- 
Date of emer- | jo. of Date ct eer. hemo pees Bertolt De ee eres, Bedot 
kG ec moths. SEO moths. Erne: moths. || moths. 
W.\5 0) Ea (een ana Bala Ae oe 30 || May 10 Sate if | May 1 ase | 24 
ORO AOEe 1 CAE Se BON! oh ahh SS eo) wie a1) es een eee | 23 
Sones 9 Hae 34 | ieee 2 ake | 24 
Mar) Moss oae. 36 Begs acs 23 1B eee 10 — 
aaa ae 34 ger 2% 20 LAR ee ae 14 Potal 426 
Breese 25 | 
i] 
THE FIRST GENERATION. 
FIRST-BROOD EGGS. 
Time of oviposition.—No eggs were laid in breeding cages in 1909 
until May 7, but numerous eggs were found in the orchard on May 5, 
iP ERBES 56 Paes 
ee ARR eee 
EEEEEEEEEEEE EER EEE 
/| 
as As aes eee 
26 2728 30|}\/ 2G FASE ET7TES9 WI I12 13 1415 16/7 /8 
APRIL | MIA 
Fia.6.—Weekly emergence of codling moths from overwintered material at San Jose, Cal., 1909. (Original.) 
18 of which were collected, mostly showing black heads of larve. 
These were carried to the laboratory and kept out of doors, the first 
hatching May 7; 14 more had hatched by May 15; the others failed 
to hatch. On May 11 eggs were numerous on the fruit and foliage in - 
the field, and 8 recently hatched larvee were found on two trees near 
the packing shed. As the average period of incubation was about 
21 days at this time, the approximate date for first oviposition in the 
field would be April 15. Since practically all moths in the field had 
emerged by May 6, it is not probable that any eggs were deposited in 
the field after May 15. The last eggs were secured in cages at the 
laboratory on May 12. Although many moths emerged after this 
date in the glass jars, very few were alive at any one time. 
Corresponding with the time of emergence of moths, eggs were 
deposited earlier in 1910 than was the case in 1909. On April 25 at 
