-8- 
In Massachusetts nearly all the adults of the cranberry girdler 
were killed with derris dust (4 percent of rotenone), applied at 50 
pounds per acre, but it was less effective than pyreth rum. --Franklin 
(196). 
Diatrae a saccharalis (F.), the sugarcane borer 
Cryolite killed 90 percent or more of the first generation in 
Louisiana. Other dusts tried included derris.— Ingram and Dugas (309). 
Gelechiidae 
Gnorimoschema operculella (Zell.), the potato tuber moth 
After potatoes are harvested in New South Wales, the tubers should 
be stored in moth-proof containers or buildings and, if they become in- 
fested, they should be dusted with a mixture of derris and kaolin (l:4) 
or fumigated with carbon bisulfide .—New South Wales Department of 
Agriculture (444) • 
In preliminary tests in eastern Australia, in which potatoes were 
exposed to larvae for a few days, derris afforded complete protection. — 
Helson (276). 
Derris mixture (1 percent of rotenone) at the rate of 6 ounces per 
hundred weight, protected stored potatoes from reinfestation in Queens- 
land for at least 2 months after fumigation with carbon bisulfide.— 
Veitch (637). 
Since derris was difficult to obtain in New South Wales in 1943, 
it was recommended that the 25-percent derris dust, usually applied 
to protect seed potatoes from this moth during storage, should be re- 
placed by one of 5 percent pyridine in kaolin, which is effective and 
much cheaper.— Lloyd (369 ) • 
Keiferia lycopersicella (Busok), the tomato pinworm 
Derris powder containing 2 percent of rotenone and 11.8 percent of 
ether extractives, cube powder containing 5 percent of rotenone and 26.4 
percent of total extractives, and an extract containing 2 percent of 
rotenone were tested in California and found inferior to cryolite, which 
was recommended for the control of this pest.— Elmore and Rowland (164 ) • 
Pectinophora gossypiella (Saund.), the pink bollworm 
In laboratory tests at Presidio, Tex. in 1933, derris dust caused 
72 to 100 percent mortality of larvae that came in contact with it. 
Poor control was obtained in the field. In 1941 derris, after exposure 
to direct sunlight, did not cause significant reduction, and even after 
