PESTS AND PARASITES 



335 



THE: EARLY STAGES OF THE SAN JOSE SCALE AT WORK IN A PEACH ORCHARD 



Trees in full fruit dying. Peach, apple, and other trees are very quickly killed by this 

 scale insect. The San Jose scale is probably the worst orchard pest that has ever come to 

 America. It was evidently brought with ornamental stock from north China, its native 

 home. It has already caused a loss of more than 50 million dollars, and more than 5 million 

 dollars a year are now being spent for spraying trees to control it. This is an annual tax 

 which does not include the damage to the trees and fruit, much exceeding the cost of 

 spraying. 



