N... I.] SCALE IXSHCTS. 437 



( )n ;i larger scale the lime, salt and sulphur wash has 

 {)ri)ved more ertectivc, hut is rather ditiieult to [)rei)are. 



AVlu'M the tree: is covered with the scale, it is hardly worth 

 treating, and should be destroyed at once. 



The oyster-shell scale young hatch about the lirst of 

 flune, and may be destroyed at this time by spraying twice 

 with kerosene emulsion or Bowker's insect emulsion. 



The young of the scurfy scale also hatch about the first 

 of June, and the best treatment for them is the same as for 

 the oyster-shell scale. 



Any of the treatments suggested for the San Jose scale 

 will also destroy the oyster-shell and scurfy scales. 



