-80- 
spray, obtained by adding 10 peroent DDT dust to -water containing a 
small percentage of spreader, at Intervals of 3 to 6 days, only 2 beetles 
were found on a treated row of corn as oompared with 128 on an untreat- 
ed row* In the susceptible variety a muoh better stand was maintained 
in the treated rows than in the untreated rows*— Packard (285) • 
Crioceris asparagl (L.), the common asparagus beetle 
C. duodecimpunotata (L«), the spotted asparagus beetle 
In greenhouse experiments from 16 to 32 times as muoh DDT was re- 
quired to kill adults of the spotted asparagus beetle as the common 
asparagus beetle. This difference seemed to hold for both stomach and 
contaot sprays* The stomach-poison sprays were made with DDT-talc-Orvus 
and were applied to the plant only, whereas the contaot sprays were made 
with DDT, Triton X 100 and Velsicol AR-60, and were appMed to the 
beetles only.— Ross (306) • 
Diabrotioa duodeelnpunctata (F.), the spotted cucumber beetle 
Both 3-peroent DDT dust and 35-percent cryolite dust gave equally 
satisfactory control of cucumber beetles. Young squash plants and pump- 
kin plants were severely stunted by EOT, the acorn squash being most 
susceptible. Young cucumber plants were stunted to some extent.— Tate 
et al. (342). 
A 3-peroent DDT dust was effective.— Has eman (203 ) . 
In greenhouse tests DDT applied as a stomach poison, 4 ounoes in 
powder suspension per 100 imperial gallons of water, gave exoellent con- 
trol of adults.— Ross (306 ) ♦ 
Indications are that DDT may be effective against the 12-spotted 
cucumber beetle.— Burtner (98, 99). 
Same as for Anasa tristis .— Granovsky (187 ) . 
During the second week of growth 30 hills of early cucumbers re- 
ceived 7 applications of 3-percent DDT dust. Cucumber beetles were kept 
under control, but some injury was caused to the plants. The margins of 
older leaves turned yellow and remained that way all summer. Harvest 
on these plants was delayed somewhat as compared with the remainder of 
the patch which was treated with cryolite. An infestation of lioe de- 
veloped on the DDT-treated plants first. After 6 applications of cryo- 
lite, 60 hills of late cucumbers (about 12 inches high) were divided in- 
to 2 plots, 1 receiving 3-percent DDT dust and the other 20-percent 
Gesarol spray. A total of 5 applications was made. Vo injury occurred 
