12 BULLETIN 926. U.’S.-DEPARTMENT OF AGRICULTURE. 
respond very closely; that is, the higher the mean daily temperature 
the higher the average number of eggs until the period of oviposition 
begins to decline (fig. 3). 
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MEAN LIAAILY TE MEL RATURLE 
mown nm—— MEAN OYLY OVIPOSITION OF 
HIGERNATED FELPTALE 
Fic. 3.—Relation of mean daily temperature to mean daily oviposition of hibernated 
~ weevils. 
The oviposition records of the boll weevil on sea-island cotton 
differ very little from those on upland cotton under insectary 
conditions. The female weevils fertilized in the spring deposited 
eggs for an average period of 31.days and the hibernated weevils 
40 
W0.OF ECGS FER FEMALE 
S 
£66 LAYING PERIOD (LAYS) 
Fic. 4.—Mean daily oviposition of female weevils in upland cotton squares. 
fertilized in the fall, for an average period of 27.1 days. The first 
and second generation weevils deposited eggs for average periods of 
35.4 and 33.6 days, respectively. The average oviposition period for 
the females in sea-island cotton squares is shown to be 31.6 days. 
€4 
