-82- 
Aspidlotua pernloiosus Comst., the San Jose scale 
The percentage of scale-infested apples wes 0.2 and 1.4 on 
trees that received lead arsenate in the first two oover sprays, 
followed with nicotine in summer oil in the other six sprays; 10 
percent on trees treated with lead arsenate in the first two sprays, 
followed with rotenone in the remaining six sprays; and 21.8 per- 
cent on trees untreated.— Herman (265) » 
Eriococcus azaleae Comst., the azalea bark scale, azalea mealybug 
Sprays containing 1*5 gallons of white-oil emulsion with the 
addition of either 1.5 pounds of derris or 1 pint of nicotine sul- 
fate in 100 gallons of water gave excellent control*— English and 
Turnip8eed (168) • 
Lepid08aphes beckii (Newm.), the purple scale 
In tests on small potted trees, derris was more effective as 
a toxic supplement when used with Mineral Seal oil and diglycol 
oleate than when used with either component of the emulsion.— English 
(167). 
Parlatoria chinensis Marlatt 
The addition of oube resin to low concentrations of oil in dor- 
mant applications inoreased the efficiency markedly. In summer ap- 
plications rotenone markedly improved the efficiency of low concen- 
trations of light-medium summer oils; 1 peroent oil containing 0.01 
to 0.02 peroent of cube resins (16.4 percent of rotenone) was near- 
ly equal in efficiency to 3 peroent of the same oil without the add- 
ed toxioant. Also, 1 peroent concentration of the same oil which 
contained 0*05 percent of rotenone in stook emulsion gave a high de- 
gree of control.— Baker and coworkers (31). 
P8eudoooocus comstooki (Kuw.), the Comstook mealybug 
Oil combined with rotenone-bearing insecticides showed promis- 
ing results against the young crawling mealybugs •■•— Cox (122 ; . 
Pseudococous cuspidatae Rau, taxus mealybug 
IN-2018 killed 90 to 96 peroent of the mealybugs; Righto about 
95 percent; and EX plus 0.4 peroent of soap, about 95 peroent. Each 
was diluted 1x400. The first proprietary mixture was a rotenone 
spray containing a special wetting agent; the second one was a rote- 
