SCALE PESTS 73 



appearance, and its oblong shape. The eggs beneath 

 the scales are in clusters, purplish in color, and they 

 hatch out about the same time as the oyster-shell eggs. 



Remedies : Same as for oyster-shell bark-louse. 

 (Special note : There is no better remedy for all scale 

 insects, than strong lime-sulphur spray. Those who 

 use it on their trees in the winter, are all right. But 

 when tree growth is beginning, it is better to fight 

 oyster-shell and scurfy bark-lice with whale-oil solu- 

 tion. Or kerosene emulsion may be used.) 



OTHER SCALE PESTS. A variety called the "plum 

 scale ' ' is sometimes found on plum trees (and occa- 

 sionally on quince, apple, pear, cherry and peach 

 trees) . Of this scale pest Prof. Slingerland says : 

 "They remind one of small halved peas colored dark 

 brown and stuck on the branches. ' ' They belong to 

 the scale family named Lecaniums, which includes the 

 " terrapin scale," the " apricot scale," and so forth. 



Olive and citrus fruit-growers in California, Florida, 

 etc., have a long list of scale troubles of their own. 

 The same remedies advocated for other scale pests 

 will prove equally successful when applied to the 

 plum or citrus or olive scales. 



FOOT NOTES. 



Concentrated lime-sulphur similar to commercial solutions 

 may be made at home, if desired. Get formula from your State 

 Experiment Station. 



Ladybirds are among the most active destroyers of scale 

 insects, and the most abundant of these beetles is the twice- 

 stabbed ladybird. 



All dead wood and thick brush should be cut out before 

 attempting to spray; and all branches that are too high to reach 

 and cover with the spray liquid should also be cut off. 



