=i 
Longevity of boll weevils.—--H. C. Young, Eufaula, Okla, states 
that boll weevils (Anthonomus grandis Boh.) that emerged from the 
hibernation cages in the spring of 1933 were placed in glass tumblers 
and fed on-cotton seedlings until cotton squares became general in | 
the fields; then they were fed on squares. Twenty-two weevils emerged 
from thé cages and complete longevity records were obtained for el of 
them, All of these emerged from the hibernation cages between May 9: 
and June 9. Their’ average longevity after emergence was 52.67 days. 
Four were alive on September 3 and one lived until September 15. This 
last weevil was collected prior to November 1, 19423 and emerged from 
hibernation on June 9, 1933: was in the hibernation cage for 221 days, 
during which time it had no food; and lived 98 days on food after emerg-— 
ing--a total longevity of 319 days. The average longevity after eme r- 
sence for weevils hibernated in prairie hay was 51:25 days; for those 
hibernated in cornstalks, 28.67 days; and for those hibernated in leaves, 
67.50 days. During May and June a number of overwintered weevils were 
collected in the field, They were placed in glass tumblers and fed in 
the same way as were those that emerged from the hibernation cages. 
The average longevity for the field-collected, overwintered weevils was 
49.43 days. The moximum longevity was 118 days for one weevil that was 
collected on June § and died on October 2. The average longevity forr 
first-generation, field-bred weevils given similar treatment was 72.14 
days. The maximum record was for a weevil that emerged on June 2/7 and 
lived until December’'1, or 15/7 days. 
Boll weevil control tests at Tallulah, La., in 1933.—-M. T. Young 
has submitted a report on the field-plat tests for boll weevil control 
conducted at Tallulah during 1933. Results from the use of sodium fluo- 
silicate, sodium fluoaluminate, barium fluosilicate, wet and dry mix- 
tures of paris green and calcium arsenate, mixtures of copper arsenite 
and calcium arsenate,and calcium arsenate mixed with line were compared 
with results from the standard calcium arsenate method of boll weevil 
control and on untreated checks. The effectiveness of calcium arsenate 
applied, at the time of cultivation, with a duster attached to the cul-— 
tivator was also tested. In order to make as many tests as possible 
with reduced personnel the number of calcium arsenate and check plats 
was decreased, Instead of the usual} 3-plat test with a standard cal— 
cium arsenate and a check for each plat dusted with the material to ‘be 
tested, the tests were laid out with 4 to 7 plats each, depending on 
he’ size of the area with uniform conditions. Forty l-acre plats were 
used, so arranged that results from each material could be compared 
with those froma calcium arsenate and a check plat. The results are 
summarized as follows: 

