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In South Carolina effective control was obtained by a thorough 
application of 10 pounds per acre of cube dust (l percent of rote- 
none) • Dust mixtures containing rotenone and cryolite gave good 
plant protection, but the cryolite gave the best protection over a 
period of days* Results obtained over a 5-year period showed that 
this pest can be controlled in tobacco plant beds, or in the field 
by cube or derris dust mixtures (l percent of rotenone) which re- 
main effective for 2 or 3 days. A thorough application of a spray 
of 2 pounds of cube (4 percent of rotenone) in 50 gallons of water 
controlled it. Some late-season tests on individual tobacco plants 
indicated that a cube dust mixture (1 percent of rotenone) gave good 
control, although a cryolite dust mixture (80 percent of sodium 
fluoaluminate) gave better plant protection over a period of 6 days. 
—Allen and coworkers (12, 13) j Allen (10); Allen and Shands (14). 
Mixtures of cube or derris and sterilized tobacco dust con- 
taining 1 percent of rotenone controlled the tobacco flea beetle. 
They should be applied soon after the tobacco plants are set in the 
field and thereafter at weekly intervals. One application per 
week or a total of eleven for the season gave the most economical 
control under conditions of heavy infestation on cigar-wrapper to- 
bacco, while one application every 10 days, or a total of three 
per season was sufficient for a very light infestation*— Chamberlin 
and Madden (108 , 109) . 
No substitute for rotenone has been found for the control of 
flea beetles on shade-grown tobacco in Florida.— U. S. Bureau of 
Entomology and Plant Quarantine (628 , p. 136). 
A derris compound used in the laboratory was much more effec- 
tive against the tobacco flea beetle than Dutox or cryolite.— 
Wene and Dominick (674) • 
Fidia vitioida Walsh, the grape rootworm 
In Arkansas the adults jmay be destroyed during the preovi- 
position period of about 2 weeks with one or two grape sprays of 
1.5 pounds of derris (4 percent of rotenone) in 50 gallons of water* 
— Isely (312). 
Galerucella xanthomelaena (Schr.), the elm leaf beetle 
In New York derris powder, 2 pounds with a wetting agent, gave 
good control. This was a standard with which various rotenone ex- 
tracts and cube were oompared.— Parrott (457) • 
