
e- ll <— 
rel with more or less clear water a concentration of 1—to-400,000 gave 
a complete kill. In a barrel treated at the rate of 1—to-333,333 only 
a few larvae died; however, although Culex egg boats are being laid 
on the water each night, no young larvae have been noted developing. It 
would appear that an abundance of food in the water keeps the larvae from 
ingesting a lethal quantity of the poison, and that newly hatched larvae 
are more susceptible than older cnes." 
STORED PRODUCT INSECTS 
Notes on pea weevils.--Tom Brindley, Moscow, Idaho, reports as a 
result of @ series of experiments in burying weevil-infested peas 3 
inches in the ground that "it is readily apparent from these exreri- 
ments that weevils can escape in considerable numbers from planted reas, 
especially if the soil temperature is fairly warm." Mr. Brindley also 
reports that weevils will lay eggs on pods from the time they emerge 
from the blossoms until the pods begin to wrinkle and harden, but that 
when pods of all sizes are available they show a preference for the larg- 
er partially filled pods. 
Tobacco moth more resistant to hydrocyanic acid gas than is cige- 
rette beetle.—-Experiments by W. D. Reed and assistants, Richmond, Va., 
on the effectiveness of fumigation of tobacco warehouses has brought out 
the significant fact that "The larvae of Ephestia elutella Hbn. showed 
approximately 10 per cent greater resistance to hydrocyanic acid gas than 
did larvae of Lasioderma serricorne Fab. in these experiments." 
Diamalt bait attractive to tobacco moth.——"Further data were secur— 
ed in Richmond during July," states Mr. Reed, "on the effectiveness of di- 
Malt bait for attracting adults of Ephestia elutella. This bait has 
proved more attractive than light traps." 
Raisin moth in figs controlled by disposal of fallen fruit.-- 
Perez Simmons reports a study by H. C. Donohoe, assisted by H. 0. Lunn, of 
the relation of the infestation of the first crop of Mission figs with 
the raisin moth to the later infestation of the main crop. This examina— 
tion concerned both picked and fallen fruit of the first crop. He states 
that "Of the 306 larvae of Ephestia recorded, only 3 were from figs pick- 
ed from trees. This is in line with our previous findings that infesta- 
tion by moths of figs on trees is not extensive. The extensive infesta-— 
tion of fallen first-crop figs, as revealed by Mr. Donchoe's work, makes 
a stronger case for sanitary disposal of this waste fruit, which is usu- 
ally allowed to remain in the orchard * * * 1% also aids in explaining 
the presence of a large population of Ephestia adults during the drying 
of the main crop." 
New uses for paradichlorotenzene.——-George W. Ellington, Sligo, Md. 
ee ee a A we 
