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, Cal., 1909, from over- 
wintering larvex collected on banded apple trees. 
Date of emer- Shee Date of emer- ae Date of emer- ve Date of emer- ee 
pence. moths. Beeee. moths. fetes moths. SELES: moths. 
i? z, | 
MAE [Qilaceaeoee Dial elev aceite a= SOM PMaye ol 0ssecses Aa wos velo pecs == 24 
Zen aa ase 1 eo Se 36 1) eee 11 || ee ee 22 
SU eee 9 Micratectuiete 34 pee ese 20 1 ee eee | 24 
May ee eee 36 NE is ae 23 See ters 10 || 
peas: 34 ee 20 ae ae 14 || Total....| 426 
Binvcmcn ae 25 | | 
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 or hie d on May 5, 
26 272830|/ 234 5 E€7EI9 MW IZIZMISIEIT/IE 
APHRIL ATA Y 
Fic. 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 fared 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. 
Conicenenuene rau the time of emergence of moths, eggs were 
deposited earlier in 1910 than was the case in 1909. On ASI 25 at 
