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multiplies so rapidly that it frequently kills young trees and 
seriously damages larger branches on older trees. 
When trees are badly attacked by this aphis the leaves are 
yellowish, more or less curled, and spotted with fungus. 
Remedies.—In winter, dress the soil around the stems of trees 
with gas lime, kainit, fresh manure, a bucketful of No. 7 or No. 15. 
In spring, spray with Nos. 7, 8, 14, 18, or 20 (see pp. 527-531). 
Natural Enemies.—The larve of several species of ladybirds 
feed upon the peach aphis, as do. also the larve of various species 
of Syrphus flies. True parasites of this aphis have as yet not 
been discovered, for the reason that the country to which the aphis 
is indigenous has never been found. 
PLuM AND CHERRY APHIS (Myzus cerasi). 
This aphis closely resembles the peach aphis in general colouring 
and shape. It appears as soon as the leaves of the trees on which 
it feeds expand and multiplies 
very rapidly, being hatched from 
eggs deposited on the branches 
during the previous fall. They 
are not so abundant in midsum- 
mer, but become numerous again 
in the autumn, when the sexes ap- 
pear and deposit their eggs at the 
base of the buds and cracks of the 
bark where they remain during 
the winter, and hatch the follow- 
ing spring. They secrete a large 
amount of honeydew, which at- 
tracts numerous flies and ants. 
Remedies.—Use Nos. 7, 8, 9, 
14, 15, 19, or 20 (see pp. 527-531). 
OrnancE Apuis (Stphonophora 
citrifollt, Ashm). 
This insect attacks the young 
wood of the orange in the spring, 
covering the trees so thickly that 
a Showing aphis on flower stem of cab- 
bage. b The winged louse (natural size). they appear quite black. Colour 
e The same enlarged; colours, greenish : : : 
yellow. d Wingless female. of insect, brownish to shiny 
black. 
Remedies.—Use Nos. 7, 8, 14, or 20. 
Natural Enemies.—This species, as well as the plum and cherry 
aphis, have many natural enemies, which aid greatly in keeping 
