it 






“Novel method of mill-insect control.— G. B. Wagner, Kansas City, 
Moi, writes that "A mill in southern Missouri has installed a commercial 
- tlethod for combating insects" by which "compressed air is bubbled through 
@ tank in which the liquid is held. This air carries vapors of the 
_ liquid into the milling machinery as the mill is operated, * * * for two 
_ hours each day. In one month's time this system has reduced the per— 
_ centage of live insects from 85.34 to 72.87. This liquid has been 
analyzed as being 90 per cent alcohol and 10 per cent orthodichloroben- 
zene. This is very inflammable. It seems to give excellent control of 
_ the Mediterranean flour moth (Ephestia kuehniella Zell.) and indicates 
_ that other mill insects are not so susceptible * * *; however, the per-— 
_ Gentage of live insects is gradually being decresed." 


Rice weevil survey.--To determine the average infestation by 
the rice weevil in stored corn in the Southern States, S. E. McClendon, 
_ din charge of the Thomasville, Ga,, station, selected representative coun- 
_ ties, in each of which he made in October counts of 100 ears of corn 
taken from each of 10 farms, noting the number of ears having weevils. 
The cribs examined in Marion County, Ga., showed ear infestations of from 
8 to 64 per cent, or an average of 37.1 per cent. Similar examinations 
in Calhoun County, Fla., showed that the infestations were much heavier 
and more uniform, ranging from 34 to 58 per cent, with an average of 
A7T.7 per cent, and in Houston County, Ala., the range in different cribs 
was from 8 to 42 per cent, with an average of 27.8 per cent. Mr. Mc— 
Clendon ‘points out that the percentage of infested ears is not a true 
indication of damage, -but that the number of weevils per ear infested is 
an essential factor (data not given in this record). He further states 
that "where corn is held approximately to the time of the new harvest, 
infestations are heavy." 
Pe Patent asked on trap for tobacco insects.—-W. D. Reed, of Richmond, 
Va., states that an application has been made for a public service pat— 
ent on the suction light trap recently devised in Richmond for trapping 
Cigarette beetles and tobacco moths in tobacco storage warehouses. 
Experiments with these traps, conducted in cooperation with a tobacco 
ecmpany in Richmond and with one in Winston-Salem, N. C., are being 
continued, with excellent results. 
TOXICOLOGY AND PHYSIOLOGY OF INSECTS 
Mosquito eggs by air mail.--F. L. Campbell, Takoma Park, Md., who 
is conducting a series of tests of insecticides using mosquito larvae, 
reports that tests are now being made successfully with larvae of Culex 
qiinquefasciatus Say from eggs received daily by air mail from the Bu- 
reau laboratory at Orlando, Fla. 
