570 



BROWN OR SOFT SCALE (Lecanium hesperidum). 



This scale differs from the black scale; it is much smaller,, 

 flatter, and has not the strong ribs so distinctive of that species. 

 Its food plants are about the same as those of the black, and the 

 results of its attacks upon plants are similar to that of the black 

 scale. It succumbs much more readily to treatment than does the 

 black scale, its covering not being so hard, and also being 

 " viviparous." 



Remedies. Nos. 18, 10, 14, or 19 (see pp. 490-492). 



Natural Enemies. Two species of parasites, yet unnamed, have 

 been successfully established in this State. 



SAN JOSE SCALE (Aspidiotus perniciosus). 



This is, no doubt, the most destructive scale insect which 

 attacks the deciduous trees ; it appears to be most destructive to 



