-82- 
The cucumber beetle was susoeptible to DDT (Gesarol A-20) under 
laboratory conditions. The DDT was added to water at the rate of 0,8 
pound in 100 gallons*— Fluke and Pond (157 ) > 
Same as for jtaasa tr i 6 1 i $ .— Or anovsky (187) • 
Sane as for Diabrotioa du o decimpunotata. — Tate et al. (542); Haseman 
(203)l Gould (184); N. J* Agr. Expt. Sta. (276). 
In greenhouse tests powder suspensions as a stomach poison gave 100 
percent kill at DDT 4 ounces and over 75 peroent kill at 1 ounce per 100 
imperial gallons of water.— Ross (506) • 
Epitrlx oucumeris (Harr*), the potato flea beetle 
At Jefferson, N* C*, plots treated with a 5-percent DDT dust yield- 
ed more potatoes than did any of five other differently treated plots, 
but the tuber yield in the 1-peroent DDT dust plot was "the lowest* Ho 
injury to potato foliage was observed* The seasonal average of flea 
beetle holes of leaf surface was lowest in the 5-percent and highest in 
the 1- percent DDT dust Dlots*— Kulash (240) * 
Extensive tests made by the Oregon Agricultural Experiment Station 
are conclusive enough to warrant recomnendation of DDT for oontrol of 
the potato flea beetle*— Burtner (98)* 
A DDT spray (A-20), used at the rate of 2 pounds to 50 gallons of 
water, reduced feeding soars about as well as calcium arsenate and oryo- 
lite when used at the same dosage, but was not so good as a 2-4-6-50 oal- 
oium arsenate-bordeaux spray* However, the DDT-sprayed plots produoed 
as high a yield as did those sprayed with the bordeaux*— Anderson (75) • 
Same as Macro siphum solanifolii (Ashm*).— N* J* Agr* Expt* Sta* (275 ) 
DDT is being recommended for its control in Oregon*— Childs (110 , 
p. 68)* 
DDT was released in June 1945 for the control of the potato flea 
beetle in Oregon*— Jenkins (227 ) • 
A DDT aerosol produoed exoellent kills*— Ditaan ( 155) » 
The pest is effectively controlled by a concentration as low as 1 
peroent of DDT, especially when -the dust actually hits the inseots. Within 
24 hours a nearly oomplete mortality is obtained*— Granovsky (185 , 186 , 
187). 
