- 39 - 
InsGct and Sta,'-::e 
Preparation 
Effectiveness 
Reference 
Homoptera (cent.) 
Aphiidae (cent.) 
Macrosiphum (lllinoia) 
liriodendri Mcnell 
Extract in water Effective 
Mclndoo, 
Sievers, and 
Abbott (66) 
in 1919 
Ditto 
Macrosiphum (lllinoia) 
solanifolii Aslim. 
Ditto 
Macrosiphum (lllinoia) 
sp. 
Powder as a dust Effective 
Powder + Hydrat- Effective 
ed lime (2,5 + 
97.5) as a dust 
Powder in water Effective 
(1:200) 
Powder in water Efft;ctive 
Macrosiphum sp. A. Powdor as a dust 50^ kill 
Ditto 
Kelsall ot al. 
(54) in 1926 
Ditto 
Mclndoo, 
Sievers, and 
Abbott (66) 
in 1919 
Mclndoo and 
Sievers (65) 
in 1924 
Macrosiphum sp . C. 
Mealy plum aphid 
Myzus cerasi F. 
(black cherry aphid) 
Powdor burned 
as a fumigant 
Cora:\'l extract 
(1:384) 
Effective 
d7»6% kill 
Dorris sprays Encouraging 
Ditto 
Garman (38) 
in 1928 
Mich. Agr, 
Expt. Sta. (69) 
in 1925 
Myzus persicae Sulz. 
(spinach aphid) 
Powder burned Effective 
as a fumigant 
Mclndoo and 
Sievers (65) 
in 1924 
Ditto 
Powder as a dust Effective 
Mclndoo, 
Sievers, and 
Abbott (66) 
in 1919 
Ditto 
Ditto 
Extract in water Effective 
Fresh root sap Effective 
Ditto 
Van der Meor 
Mohr (67) 
in 1927 
