100 QUINCE CULTURE. 
phor. Downing advises to heap ashes or lime about the 
collar of the tree. He would protect nurseries by wash- 
ing young trees with a solution of a pound of potash to a 
gallon of water. 
If the larve have already got into the trees they should 
be dug out or destroyed in their holes. Annealed wire 
or small strips of whalebone have been found useful to 
run into the holes. Besides the summer examinations, 
it is well to look over the trees in the fall and winter to 
make sure the larve are not in them. 
2. THE QUINCE SCALE (Aspidiotus Cydonia, Com- 
stock).—This is an enemy found on quince trees in 
Florida. The scale is gray, and somewhat transparent. 
The shape is convex and the size only about six hun- 
dredths of an inch across. The remedy is a strong solu- 
tion of potash or soft soap, applied with a swab or brush. 
3. THE Woo.iy ApHIs (Aphis lanigera or schizoneura, 
Hausmann).—The downy plant lice, now placed in the 
genus Hriosoma, are among the 
most destructive species. This 
aphis was imported on fruit trees 
from Europe, and yet in England 
it is called the American Bight. 
It is most commonly found on 
apple trees in the colder sec- 
tions. It was on the quince tree 
in an apple orchard at Northamp- 
ton, Massachusetts, where it at- 
tracted my attention some years 
ago. The tree had numerous 
shoots like those that spring up around apple trees, and 
these were abundantly infested. J am thus particular in 
giving the location, as I have not seen it on quince trees 
farther south, and have not seen any notice of it on the 
quince by other writers. It may be readily recognized 
by the woolly covering from which it takes its name, 
Fig. 70.—WO@LLY APHIS. 
