— 17 — 
I 
3 
Fig. 13. — Woolly Aphis, root form : a, small root showing swellings caused 
by the lice; b, wingless louse showing woolly secretion; c, winged louse. The 
lice are very much enlarged, the actual sizes being shown by the lines at the 
sides of the illustrations. 
Fig. 14. — Woolly Aphis, aerial form, showing winged and wingless lice en- 
larged, and a scar on a limb that has been attacked by the lice. 
Remedies — Probably the best remedy for the root form 
is tobacco dust worked into the ground to the amount of 3 
to 6 pounds about the crown of the tree and then wet with 
water. 
In the hands of one who has had experience, carbon bi- 
sulphide may be used effectually by injecting it into the 
ground about the crown of the tree. Kerosene emulsion, 
whale-oil soap and hot water, have all been used success- 
fully, but probably all should give way to tobacco dust, which 
is cheap, effectual and lasting in its effects. 
To keep the aerial form in check, begin in the latter 
part of May when the little white patches of lice begin to 
appear about wounds and tender places on the bark of the 
tree and, by means of a paint brush, apply pure kerosene to 
every patch of lice that can be found. 
If the lice spread over the tops of the trees they maybe 
treated with kerosene emulsion, ordinary strength, but it is 
necessary to throw it with a great deal of force so as to wet 
through the “wool” which protects the lice from any light 
spray. 
