TREE INSECTS AND THEIR CONTROL 221 
the tender growth and cause dropping of and burning them or dipping them in 
leaves, marring the appearance of the kerosene, 
tree and littering the ground underneath. 
Trees are not seriously damaged. 
SYCAMORE 
LEAF-CHEWING INSECTS 
Bagworm White-marked Tussock Moth 
(See descriptions and remedies under Elm) 
SAP-SUCKING INSECTS 
Sycamore Lace Bug 
Habits While it does not kill trees 
and nor cause serious damage, this 
Damage, sap-sucking insect is respon¬ 
sible for discoloring the foliage 
of the Sycamore and for causing the pre¬ 
mature falling of leaves, marring the 
tree’s beauty and littering the ground. 
The bug appears in the spring, with the 
starting of growth, and starts feeding on 
the foliage. Within a week or two the 
females deposit eggs on the under side of 
leaves, and these hatch in another fort¬ 
night. The young insects feed on the 
leaves immediately. The adult bugs have 
lacelike wings, prettily marked. They are 
to be found with their wingless offspring, 
in colonies on the under side of leaves. 
Two or more generations are produced in 
a single season. 
Remedy. The insect may be con¬ 
trolled and destroyed by 
spraying with soap solution, but this is 
not necessary unless the invasion is un¬ 
usually heavy. 
TULIP TREE 
SAP-SUCKING INSECTS 
Tulip Tree Aphis 
Habits This species of sap-sucking 
and insect infests branches, twigs 
Damage, and leaves during the growing 
season, feeding on the sap by 
means of pointed beaks. The presence 
of the aphis is indicated by sticky honey- 
dew on the parts affected, and by ants 
which feed on this honeydew. The aphis 
causes leaves to curl and fall, littering the 
ground, but no serious injury results. 
In appearance the insect is reddish brown, 
with pale green abdomen. 
Remedy. Spraying with 40 per cent. 
nicotine sulphate is effectual in 
destroying this insect. The spray should 
be applied as soon as the presence of the 
aphis is detected. 
