- 40 - 
Insect and Stas^ 
Homoptera (cont.) 
Aphiidae (cont.) 
llyzus porsicae Sulz. 
(spinach aphid) 
Pror^aration 
Sff octivcnoss 
Com'l extract 
(1:300) 
68% control 
RcfarcncG 
, D© Out^ and 
Y/hite (2S) 
in 1924 
Red aphids on 
goldenrod 
Po^vder + hydrat- Inoffoctivc 
ed lime (1+1) as 
a dust 
Kelsall et al, 
(54) in 1926 
RhopalosiphiJin pseudo- 
brassicao Davis 
(turnip aphid) 
Extract in 
water 
Effect Ivo 
Mclndoo, 
Si overs, and 
Abbott (66) 
in 1919 
Ditto 
Powder as a dust Effective 
Effective 
Toxoptera aurantiac Con'l extracts 
Beyer (black citrus aphid) 
Cicadellidae 
Empoasca maligna Vfalsh Com'l extracts 
(apple leafhopper), (?) 
young nymphs 
Empoasca fabae Karris 
(potato leafhopper) 
Com'l extract 
(1:^50) 
Euptoryx. flavoscuta var, Com'l extract 
nigra Osb. (1:800) + ;- 
soap (1:200) 
Coccidae 
RecomT^' 3nded 
Ineffective 
Effective but 
slow 
Ditto 
Symos (89) 
in 1924 
Met calf and 
Flint (S8) 
in 192.8 
Delone; (21) 
in 192.8 
McBrido (64) 
in 1926 
Lepidosaphos ulmi L. 
(oystorshell scale), 
crawling young 
Powder as a 
dust 
Ineffective 
Mclndoo, 
Si overs, and 
Abbott (66) 
in 1919 
Ditto 
Powd or in 
water (1 lb, to 
20 gals.) 
Ineffective 
Ditto 
Orthezia ins ignis Dougl, Powder as a 
(greenhouse orthezia) dust 
Pseudococcus citri 
Risso (mea'lybug) 
Powder as a 
dust 
Ineffective 
Ineffective 
Ditto 
Ditto 
