Other apple aphids, — Ir. all there are sever. :r eight species : f apple 
aphids* "but as their treatments do not differ vridely, only two other species 
7ri.ll be discussed here. Since 1867 the apple aphid ( Aphis pcmi Deg. ) has 
been controlled on apple trees frith nicotine in Russia, the United States, 
Canada, England, Germany, Kor^ay, and Ireland, In the earlier years, ?.:se 
Leaf, Black Leaf, Aphis Punk, Nikoteen, Niccticide (40-percent nicotine), 
tctaccc dust, and hcne-ra.de tobacco extracts vrere used in sprays or as furd.- 
gants for this aphid. Since 1915, particularly in the United States and 
Canada, Black Leaf 40 has been used as a delayed-dcraant spray, "which is 
generally incorporated "with lir.e-sulfur but sometimes trith soap, an oil 
emulsion, Penotrol, caustic soda, or potassium ole&te. 
Z'r.e rosy apple aphid ( Anuraphis rcseus 3aker) appears to have been 
treated only in the United States and Canada. Ihe best spray used against 
it "B&s a combination in the proportion of 100 gallons of rrinter— strength 
line-sulfur and 5/4 pint of 40-percent nicotine. Ihe best tine for treat- 
ment Tsas during the delayed- dormant period just tdien the buds "v^re beginning 
to shot; green, ZTicctine has been used effectively against ti-.is aphii since 1902, 
Peach aphids, — Ihere seem to be four or five species of aphids that 
infest peach tress. Ihe black peach aphid ( Anuraphis persicae-niger (Sr.dth)) 
has been controlled with nicotine since _:~c in 7rai-.ee, and for =. snorter 
time in the United States, Australia, I only, and South Africa, 3efore 1910, 
tobacco decoction, tobacco dust, Black Leo.f, and Black Leaf lip - ere used. 
After 1910 it :as corv.cn to use Black Leaf 40, sheep dips, and ether 
standardised tobacco extracts in kerosene or petrol eum evulsion, soap 
solution, or lime- sulfur. Nursery trees to be transplanted -vrere fumigated 
or dipped in a nicotine spray mixture, Aphids on the roots of peach trees 
■were controlled by putting tobaoco poTnier on the roots as already described 
for the vrcolly apple aphid. 
The green peach aphid (Ityzus persicae (Sulo.V infests vany plants 
besides the peach Tree. According _ o the literature, nicotine controlled 
it on peach"/ j potato, tobacco, beet, donate, pepper, spinach, eggplant, 
cauliflower, and other vegetables. Nicotine "was first used against it in ; 
1903, and it vas treated in: the united States, Hat.aii, Australia, Sown 
Africa, Tasmania, France, Italy, England, and India, The most common spray 
ccr.sds^ed cf 40-percent nicotine as the sulfate trith soap, but in l?2c car- 
bolated tobacco extract uns used in Italy and tobacco decoction frith soap 
in India as late as 1952, Sprouting seed potatoes vere fur.' gated v.tth 
nicotine and tobacco dust, and this species vas most easily controlled on 
vegetables by usint 3 rercont nicotine dust. 
In lists of plants the order is governed by the number of references 
t»ere cited from the literature. 
