-67- 
Pure roteinone was ineffective at concentrations as high as 8 
ounces in 100 gallons of water even when used with wetters. When 
the same concentration was used with 4 pounds of soap, a kill of 
only 93.5 percent of the aphids was obtained.-— Yothers and Griffin 
(706). 
Macrosiphoniella sanborni (Gill.), the chrysanthemum aphid 
None of the four species of Annona tested in the laboratory in 
England are superior to the leaf, root, pnd baric of Mundulep s erica , 
and all were much less toxic than the richer specimens of Derris 
elliptica root.— Tattersfi eld and Potter (583 ) . 
Three toxicity tests of mixtures of rotenone with deguelin 
concentrate, elliptone, and 1-alpha-toxioarol, respectively, were 
examined statistically* In each case, an hypothesis of independent 
action of the constituents would underestimate the toxicity of the 
mixture, but similar action satisfactorily predicts the observed 
percentage of kill.— Finney (185 ) • 
1-Elliptone was one-fifth as toxic as rotenone to this aphid 
when tested in an alcohol-saponin medium. "When the observed 
toxicities of mixtures of rotenone with a deguelin ooncentrate, 1- 
elliptone, and 1-alpha-toxi carol were compared with those predicted 
from the potencies of the constituent poisons, no significant syner- 
gistic or antagonistic effect was found, and it is therefore con- 
sidered that the use of the rotenone- equivalent method for assess- 
ing the toxicities of derris roots or resins is justified.--Kartin 
(397). 
Macro8iphum pisi (Kalt.), the pea aphid 
This aphid in Wisconsin was effectively controlled by dusting 
thoroughly with a 1-percent rotenone dust at the rate of 25 to 30 
pounds per acre, but under warm, wet conditions as little as 20 
pounds was effective.— Delwi eke and coworkers (128); Wisconsin Agri- 
cultural Experiment Station (692 ) • 
In Quebec the use of a bamboo pole drag enhanoed the value of 
rotenone dust.— Kaltais (389). 
The addition of a small amount of crude peanut oil to a derris 
dust mixture appreciably increased the effectiveness of the dust.— 
Bronson and Dudley (90). 
