EXPERIMENT STATION BULLETINS. 



291 



encrust the bark or (o prove a serious drain on the tree. The scales often are 

 grouped in small radiate clusters. 



Fig. 6. — Eccentric Scale, from Author's Bui. 100. Mich. Ex. Sta. 



EEHEDIES. 



In point of importance this scale must not be classed with the San Jose. It 

 occurs on most if not all of our fruit trees and on many shade trees, but it may 

 he present on such trees for years without being noticed. It succumbs to the 

 same remedies as those used against the San Jose scale, — winter spraying with 

 lime-salt and sulphur or with strong kerosene emulsion. 



The Scurfy Bark-louse. (Chionasjiis furfurus.) 



A scale insect that may be classed with the oyster-shell bark-louse so far as 

 its economic importance is concerned, is the scurfy bark-louse of the pear and 

 apple. The scale when newly made is pure white in color, with the cast skins 



Fig. 7. — Scurfy Bark-louse, after Howsni, U. S. Dept. of Agr. Div. of Entomology. 



at one end, they being brown in color. The female scale is smooth while the 

 male scale is narrow with three parallel longitudinal ridges running the entire 

 length. This insect is apt to work on poorly fertilized and poorly cultivated trees. 



EEJIEDIES. 



The same remedies will apply as those recommended for the oyster-shell bark- 

 louse. 



European Fruit-scale (see Plum Insects). 

 English-walnut Scale (see Peach Insects). 

 San Jose Scale (see Peach Insects). 

 Fruit Bark-beetle (see Peach Insects). 



