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15-percent solution of DDT in oil sprayed on packages of cigarettes did 
not prevent them from becoming infested during an exposure of 30 days.— 
White (373) . 
Itiella zlnckenella (Treit.), the lima bean pod borer 
Three applications of 3-percent dust (Gesarol A-3) were made May 21, 25 t 
and 26 on lima beans at the rate of 30 pounds per acre. Rains within 2U hours 
after the second and third applications washed off the dust. An average of 
1+3.8 percent wormy pods occurred in the dusted plots and 36.2 percent in the 
checks.— Swart ( IU5 ). 
Mlneola vaccinii (Riley), the cranberry fruit worm 
Two applications of each of three dust mixtures were compared in a cran- 
berry bog in New Brunswick. The percentage of berries injured with the different 
mixtures were as follows: Gesarol A-3 dust (3 percent DDT) 3^»7i Lethane B71 
35*^; gypsum-cryolite (70:30) ^2.U; check 75«5« I n tv0 other tests the Gesarol 
gave approximately the same results as the gypsum-cryolite dust. — Ross ( 306 ) . 
Plod la Interpunctella (Ebn.), the Indian meal moth 
In tests in grain-elevator bins pyrethrum applied either as a spray or an 
aerosol gave much better control of both adults and larvae of the Indian meal 
moth than did a DDT aerosol. The pyrethrum aerosol contained pyrethrum extract 
5 percent (pyrethrins 1 percent), either oleic acid or oil of sesame 2 percent, 
and Freon 93 percent; the pyrethrum spray contained pyrethrum extract 10 percent 
(pyrethrins 0.^ percent) in a high-grade oil such as Deobase, Pensolene, or 
Imperial No. 9» aad. the DDT aerosol consisted of DDT 5 percent, cyclohexanone 
10 percent, and Freon 85 percent. Adults were more susceptible than the larvae 
to DDT aerosol. In another test c kerosene spray containing 5 percent of DDT 
was applied to larvae on the ceiling of a grain store room. Only a few of the 
larvae dropped to the floor and 2k hours later there was no significant de- 
crease in the numbers of larvae on the sprayed areas. Test insects were 
exposed on wheat treated with small amounts of DDT combined with Almicide, 
a chemically inert mineral dust which has the property of promoting ex- 
cessive water loss from insects. Although the Almicide alone caused no 
mortality at the dosage applied (maximum rate 1 part dust in 15,000 parts 
wheat), it appeared to exercise a marked influence on the insects when 
combined with DDT, e.g. after 5 days' exposure, at a dosage of 1:28,000, 
undiluted DDT was not significantly more effective than the DDT-Almicide 
dust containing only 26.6 percent of DDT. ISheat mixed with IDT-Almicide 
dust (containing 18 percent of DDT) in the ratio 16,000:1 killed 15 
percent of the larvae of the Indian meal moth after 10 days' exposure. 
—Ross (306). 
To 500-gram samples of wheat, 0.05, 0.025 and 0.005 percent of technicel 
DDT was added. The samples were placed in glass jars together with larvae of 
the Indian-meal moth. At the end of the first week all three dosages of DDT 
