Many traps were near tobacco fields. Some of these caught moths and some 
did not. If tobacco had any effect on catch, it was obscured by other factors. 
However, in the second experiment with light traps the catch was definitely 
higher in traps near tobacco, as shown by table 3. 
TABLE 3.--Mean number of hornworm moths caught in light traps in relation 
to tobacco fields, Aug. 19-Sept. 29, 1961 
Trap location Number of traps Mean number per trap of-- 
P. | oP. sexta | P. quingquemaculata 
ae esate avi Male Female 
L/ 
Near tobacco------------- a ie IOUS Tf Sn Lear 
Far from tobacco--------- 82.6 32.0 
1/ Difference significant at l-percent level. 
2/ Difference significant at 5-percent level. 
RANGE OF TRAPS 
Eyal 1961 moths were marked and released at varying distances from one trap. 
The results are shown in table 4. There was no apparent difference in the 
number recaptured in this trap up to 0.19 (3/16) mile, but nine other traps that 
were 0.31 to 1.43 miles distant caught more moths than were taken nearby. On 
August 11 and 28 a total of 218 moths were marked and released within 50 feet of 
a trap. Forty-two, or 19.3 percent, were recaptured in this trap. Nine were 
taken in more distant traps. Obviously not all the moths released at any given 
time will be caught. 
DISTANCE TRAVELED BY HORNWORMS 
In 1961 most of the moths caught each day were marked and released. The 
total numbers released and recaptured in different experiments are shown in 
table 5. In the first experiment the numbers recaptured with bait traps and the 
two light traps within range were too low to have much meaning. In the second 
experiment with 14 light traps distributed in a circular area having a radius of 
1 mile and an additional light trap 2.43 miles away, there was no relationship 
between distance from the point of release and trap catch. Since the trap at 
2.43 miles also caught moths moving far beyond the l-mile radius, the traps were 
relocated in a much larger area for the next experiment and moths were again 
released at the center. 
