-64- 
This insect on sugar cane in the Philippine Islands can be con- 
trolled with derris powder.— Otanes and Karganilla (453 ) . 
Aphis pomi Deg., the apple aphid 
A laboratory-prepared sample of pure rotenone gave 100 percent 
mortality at a concentration of 3 ounces in 100 gallons of water 
with a wetter, and an approximately complete kill at 2 ounces with 
sodium cleate. Nicotine and anabasine sulfates with accessory agents 
gave almost complete mortalities down to concentrations of 1:3,200, 
— Yothers and Griffin (706 ) . 
NNOR, (technical mannitan monolaurate, 97.2 to 96.4 percent, 
rotenone 1 percent, and other derris extractives 1.8 to 2.6 percent) 
at 1:800 gave excellent control.— Roth and Pyenson (617 ) ■ 
Acetone extracts of the roots of the Texas Tephrosia virginiana , 
grown in New Jersey, were highly toxic to this aphid.— Ginsburg and 
coworkers (227 ) . 
Aphis rharoni Boyer de Fonscolombe 
Derris resin tested in England against the eggs of this aphid 
was more toxic, weight for weight, than 4,6-dinitro-o-oresol which 
is recognized as one of the most potent ovioides»— Potter and 
Tattersfield (471). 
Aphis fabae Scop, ( "rumlcis L.), the bean aphid 
Potassium oleate soap was definitely a better spreader for derris 
than either potassium soap of FF wood rosin or that of rosin residue. 
When used alone the order of effectiveness (from most effective to 
least effective) for the three toxic agents under test was as follows: 
Acetone extraot of derris, Black Leaf 40, and 20 to 1 alooholio ex- 
tract of pyrethrum.— Fassig and Pierpont (176 ) . 
Yam bean (1.5 g. to 100 oo. of water) killed 99 percent, while 
cube (^- g. to 100) killed 100 percent of the aphids. Water suspen- 
sion of ground yam beans and various extracts of them each killed 100 
percent, or nearly so, of the aphids tested, while water suspension 
of cube powder and various extracts of it each killed 100 percent. 
Also, the water suspensions of the powdered root and seed of 
Millettia pachycarpa killed 100 peroent of the aphids, but the vari- 
ous extracts of the seed were not so generally off ective.— Hans berry 
and Lee (268 ); Lee and Hansberry (360 ) . 
