-87- 
Phyllotreta spp. 
Controlled by eight applications of 5-percent DDT in light summer 
spray oil, average about 1/2 gallon per acre, made with hand atomizer 
from June 6 to August 1*— Gray (188) • 
Adults were placed on foliage which had been treated in a bell jar 
settling chamber* The treated foliage was changed daily. Mortality 
after 48 hours was 99 percent for Gesarol A-3 dust, 91 percent for Neo- 
cid A-10, and 16 percent for the check*— Ross (306) • 
One application of Gesarol A-3 dust to turnips removed an infesta- 
tion of striped flea beetle in 2 days.— Janes (225 ) ♦ 
Cocoinellidae 
Adalia bipunctata (L*), the two-spotted lady beetle 
Under laboratory conditions adults are quite readily killed by walk- 
ing over surfaces sprayed with a water suspension of 13DT. The DDT (Gesarol 
A-20) was added to water at the rate of 0.8 pound in 100 gallons of water* 
—Fluke and Pond (157)* 
Epilachna varivestis Iftils*, the Mexican bean beetle 
Not controlled by a DDT aerosol*— Ditman (133) • 
In cage tests in New Mexioo a pyrophyllite dust containing 3 percent 
of DDT killed 93*8 percent of the larvae in 72 hours* In field tests this 
dust gave results as favorable as those of a 0*5 percent rotenone-talo 
dust*— Eyer (147) • 
Four applications of 3-percent DDT dust with sulfur added were made 
with a hand duster to bean plants infested with a few Mexican bean beetles 
and many potato leafhoppers* Dry weather eliminated the Mexioan bean 
beetle population and reduoed the yield from the plots* The yield varied 
considerably and that of the DDT-treated plots was below that of the un- 
treated area* The DDT dust had no harmful effect on the plants* — Gould 
(184). 
A 3-percent DDT dust and a spray containing 1 pound of DDT in 100 
gallons of water were tested against standard treatments. The DDT treat- 
ments were inferior to a .4-percent rotenone dust in the control of the 
Mexican bean beetle.— N. J. Agr. Expt. Sta. (275 ). 
As in 1943, experiments in 1944 showed that DDT applied as a dust 
or as a spray suspension had little toxio effect on the Mexican bean 
beetle. In field experiments oonducted in North Carolina, the control 
from a 10-percent DDT dust, applied with hand dusters in two of the ex- 
