236 SUCCESSFUL FKUIT CULTURE 



the under side of a mature insect with the numerous 

 eggs; bj same from above; c, twig infested by female 

 scales ; d, male scale, and e, twig infested therewith. It 

 generally attacks weak trees and often destroys them. 



Remedy — It may be destroyed while the trees are 

 dormant by brushing over with linseed oil, by the use 



& 



Fie. 117— Oyster Shell Bark Lonse 



of fifteen to twenty per cent mechanical solution of kero- 

 sene oil, or by a strong solution of whale-oil soap, 

 two pounds to one gallon of water; or, after the 

 leaves have unfolded, with a ten per cent solution of 

 kerosene when the young are moving about, which is 

 generally during the early part of June. As when used 



