BLISTER-MITES AND LEAF-MINERS 309 
Fig. 471.— Apples deformed by the Pear-leaf Blister-mite. Original. 
Treatment consists in spraying in winter with lime-sulphur solution, 
so as to kill the hibernating mites. In summer they cannot be reached 
by any spray material because of their feeding habits. 
The Apple Leaf Trumpet Miner 
(Tischeria malifoliella Clem.) 
Characteristic, trumpet-shaped 
mines in the upper surface of 
apple leaves indicate the presence 
of this insect. Usually the mines 
are not more than a half inch 
long, beginning with a quite nar- 
row brown or dead area and en- 
larging rapidly to their maximum 
width. 
There are from two to four 
generations annually. The winter 
is passed by the full-grown larva — Fic. 472.— Work of the Apple Leaf 
in its mine in fallen leaves. The Trumpet Miner. Original. 
tiny adult moths emerge in the spring with the expanding of apple 
foliage. 
