-50- 
Sprays containing 0.1 percent of niootine were extensively and 
successively used in East Prussia, because derris and pyrethrum were 
scarce.— Janisch (319) ♦ 
Rotenone was considered fair, and rotenone with a copper fungi- 
cide good, for flea beetles in victory gardens in Indiana, — Reed ( 496) . 
One of the more important uses of rotenone is to control flea 
beetles on vegetables, flowers, and fruits. Substitutes are: bordeaux 
mixture, although much inferior; calcium arsenate, cryolite, and bari- 
um fluosilicate. — U. S. Department of Agrioulture (633 , p. 14). 
Coccinellidae 
Bpilachna chrysomelina F«, 12-spotted ladybird beetle 
In Palestine the larvae on cucurbits were easily controlled by 
barium fluosilioate or sodium fluosilicate, and the adults by derris 
dusts .--Anonymous (2). 
Epllachna varivestis Muls., the Mexican bean beetle 
In Maine in 1940 rotenone was practically as effective as cal- 
cium arsenate, but did not remain effective as long as the arsenate. 
Rotenone dusts without wetting and spreading agents were effective 
and were safe to use on beans, both from the standpoint of injury to 
the beans, and human safety.— Hawkins (271 , 272) . 
In Louisiana the best insecticidal treatment leaving no residue 
on the bean plants was a derris or cube dust (1 percent of rotenone), 
applied at the rate of 15 to 25 pounds per acre at weekly intervals 
when the bean beetle was active. Cryolite at 10 to 15 pounds per 
acre can be used until the bean pods begin to form.— Eddy ( 159 ) . 
In laboratory tests with derris, cube, timbo, and Tephrosia 
virgin! ana , mixed with talc or sulfur to give a 0.5 percent rotenone 
content, cube gave 10 percent lower kill than the other dusts, kill- 
ing only 70 to 90 percent of bean beetles in 72 hours, compared with 
100 percent for the other dusts. In other comparative tests with 
commercial samples of derris, timbo, and cube, and samples of powder- 
ed tephrosia roots, derris and tephrosia were more effective than 
lonchaoarpus of the same guaranteed rotenone content. — Arant (22, 26) • 
Certain new coal tar insecticide dusts were as effective as a 
0.75 percent rotenone dust.— Ferguson ( 180 ) • 
