in 25 gallons of water, or a dust of barium fluosilioate and hydrated 
lime (lt4). The addition of a petroleum sulfonate (Ultrawet) to the 
cube dust (1:1000) increased its effectiveness and reduced the feed- 
ing of ttie beetles.— Connecticut Agricultural Experiment Station (120 , 
p. 299). 
All dusts tested against this species on shade-grown tobacco 
were more effective than the sprays, and gave significant reductions. 
On the sun-grown tobacco, pyrethruiB dust was more effective than the 
cube dust, which was more effective when it contained no wetting agent. 
—Morrill and Lacroix (427) . 
Newly set tomato and eggplants may be protected from flea beetle 
damage by dusting them three times weekly with cube dust (0.75 per- 
cent of rotenone) .—Turner (597 ) . 
In Connecticut in 1941 the most satisfactory control of this 
pest was obtained with a cube-tobacco dust mixture containing 1 per- 
cent of rotenone, and with an impregnated pyrethrura powder. Prior 
to 1936 commercial damage caused by E. cucumeris to shade-grown, cigar- 
wrapper tobacco was estimated at 20 To 50 percent. In 1940 the growers 
estimated this damage to have been reduced to 1 to 2 percent by the 
use of a dust mixture containing 1 peroent of rotenone.— Morrill (425 ) j 
Morrill and Lacroix (428 ) ♦ 
NNGR, consisting of technical mannitan monolaurate, rotenone 
(l percent), and other derris extractives (1.8 to 2.6 peroent) was 
tested against the potato flea beetle on eggplant. Dilutions (it 1200) 
gave 86 percent mortality.— Roth and Pyenson (517) • 
A *3-way* dust of pyrethrum, rotenone, and sulfur gave increases 
in yield of potatoes from 70 to 90 bushels per acre. The rotenone 
caused a significant reduction in flea beetles and aphids.— Skaptason 
and Blodgett (542 ). 
Derris and Syntone in combination with bordeaux mixture gave a 
high initial kill, and the potato foliage treated with these materials 
was relatively free from flea beetle injury.— Anderson and Walker (18). 
To control this pest on tomato plants, in seedbeds or on newly 
set plants, it was recommended in 1942 to use a derris or cube-talc 
dust mixture containing 1 percent of rotenone.— Beattie and ooworkers 
(43). 
Flea beetles on tobacco in plant beds in Florida and Georgia can 
be controlled by a cube or derris dust (l percent of rotenone). A 
mixture of this dust and sterilised tobacco dust containing 1 percent 
of rotenone should be applied soon after the plants are set in the field 
and thereafter at weekly int erva Is •— Chamber lin and Madden (109 ) . 
