38 - 
Insect and Stage 
Homoptera (cont.) 
Aphiidae (cont.) 
Aphis- rumicis L. 
(bean aphid) 
Ditto 
Pronai'ation 
Effectiveness 
P.efereixce 
Powder in water Effective 
(l:33aO) 
Rotenone in water 100^ kill 
(75 p. p.m. ) 
Mclndoo, 
Si e vers ^and 
Abbott (66) 
in 1919 
Tattersfield 
et al. (9E:) 
in 19a-6 
Aphis sp, A. 
Powder as a dust Effective 
Mclndoo and 
Sievers (65) 
in 19Z4 
Ditto 
Aphis sp. B. 
Ditto 
Aphis spiraecola Patch 
Ditto 
Apple aphids, various 
species; 
Hot water extract Effective 
Powder as a dust Effective 
Hot water extract Effective 
Extract in water Z0% kill (check 
(Equiv. to 1 lb. 20^ 
powder to 100 
gals, water) 
Powder in water 50/^ kill 
(1:830) 
Com' 1 extract Encouraging 
(?) 
Ditto 
Ditto 
Ditto 
Mclndoo, 
Sievers;, and 
Abbott (66) 
in 1919 
Ditto 
Mich. Agr. 
Expt, Sta, (69) 
in 19a5 
Capitophorus ribis L. Powder + hydrated Ineffective 
(currant aphid) lime (1+1) as a 
dust 
Cavariella sp, 
Powder in water Ineffective 
(1:400) 
Eriosoma lanigerum Hausm.Po'.vder in water Ineffective 
(woolly applo aphid) 
Ditto 
Fresh root 
Ineffective 
Kelsall et al. 
(54) in 192.6 
Brittain (13) 
in 1924 
Durham (27) 
in 1926 
Gimlotte (45) 
in 1923 
Macrosiphoniella sanborni Powder as a dust Effective 
Gillette (black chrysan- 
themum aphid) 
Mclndoo and 
Sievers. (65) 
in 1924 
