SMALL SCALES ON BARK OF TRUNK OR BRANCH 257 
Several other species closely resemble the San José scale, and on 
superficial examination can hardly be distinguished from it. They 
have not, however, so distinct a 
ring and nipple. 
The Putnam’s Scale (Aspi- 
diotus ancylus Putnam) infests 
many kinds of fruit and shade 
trees. It has one generation 
annually. 
The Cherry Scale (Aspidiotus 
forbest Johns.) is found on the 
bark of cherry and other fruit 
trees. It is lighter in color 
than the San José scale. 
The European  Fruit-seale 
(Aspidiotus ostreeformis Curt.) 
attacks principally plums, but 
occasionally other fruits, except 
the peach. It produces several 
generations annually and is 
often a serious pest. 
Fig. 349.— Branch incrusted with Put- 
nam’s Seale. Original. 
For all of these the best treatment is a winter spraying with lime 
sulphur. 
Fic. 350.— Cherry Scale. 
8 
Enlarged to seven times natural size. 
Original. 
