526 
Natural Enemies 
An undetermined internal parasite has 
been bred from this species. 
EK. O. Hssie 
Green Apple Aphis 
Aphis poms or Aphis mai 
These lice lay their shiny black eggs 
in October and November in crevices 
of the bark and in scales of the buds 
of the apple trees. After the first brood 
hatches in the spring about the time of 
the unfolding of the first buds and until 
late in the autumn they may be found 
at all times on the apple trees. Their 
presence in the spring may be detected 
by the curling of the tender leaves on 
the under side of which the aphids make 
their home. 
These lice, like others of the family, 
eat more than they can assimilate and 
the excess exudes from the “honey tubes” 
near the posterior end or from the anal 
opening. “This liquid is highly prized 
Fig. 2. Apple Aphis. A, stem 
ENCYCLOPEDIA OF PRACTICAL HORTICULTURE 
by the ants, which are Nearly always 
to be found running over and around 
the aphis colonies. It is a great mistake 
to suppose that ants eat the aphis or 
injure them in any way, on the other 
hand ants often protect and aid some 
species of lice in return for the Sweet 
liquid, called honey dew, of which they 
are so fond. 
"The honey dew is directly lespon- 
Sible for the black, sooty fungus growth 
which nearly always follows the appear- 
ance of the green leaf aphis. The fun- 
gus thrives on this honey dew, and soon 
clogs the breathing pores of the leaves, 
resulting in their turning brown, wither- 
ing and dying. In this manner it may 
prove quite injurious to leaves not actu- 
ally infested by aphids because such quan- 
tities of honey dew drops from aphis 
colonies to the leaves beneath.” 
The first two or three generations of 
*R. I. Smith, North Carolina Bx 
Station, Bulletin 206. periment 
E Chine ~ 
Mother just hatched from egg; B, winged female such as 
migrate from tree to tree during summer; C, wingless female of summer form: D, leaves 
curled by this aphis; HB, eggs magnified; F, buds just opening, showing newly hatched 
CBRE G, twig showing eggs as they appear in the winter time. 
(Montana Experiment Sta- 
