ao 
open bolls were completely submerged on the plants for 60 hours or more 
many larvae were killed, but a short submergence killed very few. The 
larvae in green bolls were more protected and fewer were killed by sub— 
mergence. Laboratory tests showed that some pink bollworms can survive 
in submerged green bolls for 9 days, in open bolls either submerged or 
floating in water for at least 12 days, and in floating green bolls for 
at least 16 days. * * * the flood had greatly reduced the larval popu— 
lation of the pink bollworm in the Presidio district at the beginning of 
the 1932-33 winter. The destruction of entire cotton fields by submerg- 
ence, the killing of many plants in others, together with all parts of 
the plants in partly submerged fields, served to concentrate the moths 
on the remaining bolls of the top crop, and resulted in 100 per cent in— 
festation. The pink bollworm modified its habits to survive in the part— 
ly flooded cotton fields where many plants were still alive. The flood 
apparently had no effect upon the migration of moths in partly submerged 
PLoLas 
‘Winter feeding of tarnished plant bug.—-K. P. Ewing and R. L. MoGarr, 
Tallulah, La., report that "no sweepings were made from December 12 to 24, 
inclusive, but during the other three weeks of sweepings Lygus pratensis 
L. was found to be active in the fields. Nymphs were collected in the 
field during the first two weeks, but only adults were found during the 
last week (December 26-31). It is interesting to note that on an aver— 
age 14 L. pratensis per 100 sweeps were collected on alfalfa during the 
week of December 26 to 31, showing that this insect was evidently feed— 
ing again, after much cold weather." 
Sulphur dioxide fumigant deposits sulphur in boll weevil tissues.— 
"Fumigation tests with sulphur dioxide gas on boll weevils collected 
from Spanish moss during the latter part of November were continued in 
December," report F. H. Tucker and J. C. Pearson, Tallulah. "Twenty-three 
tests were made during the first part of the month, with varied concen— 
trations of sulphur dioxide gas at varied time and temperature. =i 
Analyses of the weevils collected from moss and exposed to sulphur diox— 
ide gas, killed and not killed, have been made. Thus far 14 analyses 
show an abnormal incorporation of sulphur in the bodies of the weevils 
killed by exposure. Weevils exposed but not killed have shown but little 
above the normal sulphur content * * * Weevils collected from the moss 
and not exposed to sulphur dioxide gas were used as checks in the analy— 
ses for normal sulphur content." 
Collections of boll weevils from Spanish moss—-totals for 1925 to 
1932.--"The annual fall Spanish moss examinations to determine the num-— 
ber of weevils entering hibernation were begun on November 22 and completed 
December 12," by R. C. Gaines and assistants, Tallulah. A tabulation of 
the number of "live weevils per ton of Spanish moss from 1925 to 1932, 
inclusive, for all localities where records are available" shows that 
"831 live weevils per ton at Tallulah is the highest number for any year 
for which records are available, the next highest record being 724 in 
