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sixth generation in squares pupated and moths emerged, although the du—- 
ration of the different stages was increased because of lower temperatures. 
The first moths of this generation emerged November 23. Some larvae 
appeared to have spun long-cycle cocoons late in the month." Mr. Fife 
found that "long-cycle larvae were present in the fields at least as 
early as September 16 and probably much earlier." 
An experiment was conducted by Mr. Noble "to determine the possi- 
bility of pink bollworm moths laying fertile eggs after long flight. 
The treatments simulated some of the conditions to which moths would 
be exposed in making flight, or being carried by air currents, in the 
upper air at elevations of from 3,000 to 4,000 feet for periods of 1 to 
7 days. The temperature at which the moths were held while isolated 
from cotton plants averaged approximately 60° F. This was very 
close to the mean temperature to which the moths would he exposed at 
elevations of from 3,000 to 4,000 feet above ground level." From the 
results of this experiment Mr. Noble concludes "that it is biologic- 
ally possible for a female moth to start or to continue oviposition upon 
finding cotton again after being isolated from this plant for periods 
of 1 to 7 days. In other words, one female moth can start an infesta— 
tion in cotton after a several days' migratory flight from the field 
where it Originated." 
C. S. Rude, stationed at the Tlahualilo, Dgo., Mex., sublaboratory, 
reports: "No (pink bollworm) moths were taken from the migration screens 
during the month. This is a very unusual record for Tlahualilo. It is 
possible that the unusually dry fall has had something to do with the 
extremely light catch this year." However, 22 moths were taken in the 
trap in 47 nights when it was operated three nights each week from 
August 1 to November 18." Mr. Rude says: "It is of. interest to note that 
during August the number of males and females was almost equal but that 
later there were about four females to each male attracted to the light." 
Mr. Rude also reports: "Three species of wild malvaceous plants 
have been studied to determine their réle in the continuation of pink 
bollworm infestation in the absence of cotton, Hibiscus cardiophyllus 
Gray proved to be a true host plant. The pink bollworm overwintered 
successfully in seed capsules of this plant, moths emerged the follow- 
ing spring, reinfested this plant, and development continued through— 
out the growing season. Furthermore, this plant is quite commonly 
found infested in its native habitat in the Campcfia Mountains near 
Tlahualilo." Infestation of seed pods of Hibiscus spp. in the labora-— 
tory gave the following percentage of 'take': "H. coulteri Gray, 65.7; 
H. Gardiophyllus,. 36.06; H. denudatvs Gray, 15.6. * * * Of the cul- 
tivated plants studied, okra is quite heavily infested. The pink boll- 
worm can overwinter successfully in the pods, and moths emerge the fol~ 
zOWing year." 
