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Toxoptera aurantii (Fonsc), the black citrus aphid 
For the combined control of aphids, red mite, and black soale 
a spray consisting of light-medium oil, 0.5 to 0.75 percent, with 
rotenone may be used.—Quayle ( 482 , p. 26). 
Toxoptera graminum (Rond.), the green bug 
Valuable seed crops in Argentina can be protected with dusts 
of nicotine sulfate, pyrethrum, or rotenone.— Lopez Cristobal 
(371). 
Toxoptera piricola Mats. 
In Japan sprays of pyrethrum, nicotine sulfate, or derris with 
soap, applied when the eggs on pear trees hatch in the spring, are 
recommended for control.— Yago and Furuichi (702 ) . 
Unidentified Aphids 
Sprays containing pyrethrum or derris, or extracts from these 
materials, are sometimes used for the control of aphids on grapes. 
— Pemaree and Runner (139 , p. 27), 
Plant sprays containing 1 percent of rotenone and 4 percent of 
total acetone extractives of derris root will give a good kill of 
many species of aphids at dilutions of 1:800.— Hamilton ( 253 , p. 10). 
A spray mixture consisting of derris powder, pyrethrum extraot, 
and sulfonated castor oil with water is effective against aphids 
and many other insects.— Howard and coworkers ( 294 , p. 31). 
Derris sprays are commonly used to oontrol aphids in China.— 
Chan (110 ). 
Tests with derris and rotenone dusts as a substitute for a 
spray of niootine sulfate and soft soap, for the oontrol of aphids 
in Cyprus, were unsuccessful except at oonoent rations that were more 
costly than the nicotine spray.— McDonald (380) • 
Rotenone and copper-rotenone were considered fair for aphids 
in viotory gardens in Indiana.— Reed (496 ) . 
For control of aphids on rape, kale, turnips, and swedes in 
South Africa either dusts or sprays of Pyrocide and Derrisol may 
be used. — Schulta (527). 
