~33- 
Boll weevils on flight screens during winter.--G. L. Smith, of 
the Tallulah, La., laboratory, has for several years been studying 
the winter movement of boll weevils (Anthonomus grandis Boh.) by 
flight screens, Standard size (3' x 5') screens, coated with tangle- 
foot, are located in several fields and the insects removed at regu- 
lar intervals. The following table lists the number of screens in 
use and the number of weevils taken during January, February, and. 
March for the past 3 years: | 
Month : ___ Boll weevils collected 
Pega", oaeul Mag ztome Ae Vue 4 a 
2: Number > Number : Number 
Pry os v's oe © tate se ; 207.0: 6.0. 11.0 
EE ELV ose Siw g pisses wR ; 1/5.0 L.0 : 950 
| 0) ee Abpea f i, 223.0 9.0 6.0 
= Oe ty - 605.0 seRhuavnG,Okvecr on 20.0 
Number of screens ...... : 4 26.0 : 20.0 ee 
Average per screen ..... ; ; 0.8 2.2 

There is considerable correlation between the records obtained 
from the flight screens and those obtained from the hibernation cages 
and Spanish moss examinations at Tallulah. All three indicate more 
winter activity of boll weevils in 1934 than in 1933 but much lower 
than in 1932, as is shown in the following tabulation: 

: Live weevils :; active weevils . : Weevils caught per 
Year * per ton of : in cages during : screen during 
spun $2—MOss ‘¢ January, February, : January, February, 
Sm eae : and March’ : anc March 
iimaber aN Number - : Number 
BOBS) wah fat CS acs Maer poll ce dS ok Ae : 23.3 
1933 eo Lerphejers . ea ee +e 1g. ; 0.8 
eve 

Feith ernie skit 40.2 ; crane: oN 
