Insoct and Stago 
^•omoptora (cont.) 
Aphiiduo 
Aphids, many spocios- 
Aphids (black lico) on 
chestnut trcos' 
Aphids on a cut -leaf 
birch 
Aphids on rosebush 
Aphids on tobacco 
Ditto 
Ditto 
Ditto 
Ditto 
Ditto 
Aphis gossypii Glovor 
(cotton aphid) (molon 
aphid) 
Ditto 
- 36 - 
Preparation Eff octivonoss. 
Extract 
Effective 
Com'l extract Effectivo 
in water (1:3000) 
Powder in water Effective in 
(1:666) 48 hrs. 
Com'l extract Effectivo 
in water (1:3000) 
Fresh or dried Effective 
root decoction in 
■wctcr (1:100) + 
soap (1:32D) 
Fresh root sap Effectivo 
Fresh root in 
vmtor (1:100) + 
soap (1;200) 
Fresh root in 
v;ator (1:100) + 
soap (1:333) 
Re comm ended 
Effective 
Fresh root sap Effectivo 
Fresh root in Effective 
water (3 kg. in 
80 liters) (1:27) 
Alcoholic 
extract 
Extract in 
wat or 
l/s as effectivo 
as similar cube 
extract 
Effective 
Reference 
Molndoo and 
Siovers (65) 
in 1924 
Anon . ( 3 ) 
in 1927 
Kelsall et al. 
(54) in 1936 
iijion. (3) 
in 1927 
Bourcart (9) 
in 1925 
Deli Proefsta, 
(23) in 1927 
Fulmck (35) 
in 1924 
Fulmck (36) 
in 1925 
Fulmek (37) 
in 1927 
Hollrung (50) 
in 1923 
DeiJiis (24, 25) 
in 1927 
Mc Indoo , S ic vers., 
and Abbott (66) 
in 1919 
Ditto 
Ditto 
Povj'dor in v/ator Effective 
Powder as a dust Effective 
Ditto 
Ditto 
