LOUISIANA CIRCULAR No. 4. 23 



unfortunate as to already have this destructive insect in his or- 

 chard or ornamental grounds. 



Serious as the San Jose scale is, it can nevertheless be kept 

 fully under control when occurring upon deciduous trees. This 

 fact, however, cannot be taken as justification for introducing it 

 into one's orchard or even for neglecting in the slightest degree 

 those quarantine restrictions which prevent or limit its distribu- 

 tion. The treatment of infested orchards, while not particularly 

 expensive, is nevertheless an expense which the fruit-grower does 



FIG. 10. Spraying trees with the "bucket pump." (After photo by Brit- 

 ton, Conn. Exp. Station.) 



not have to incur so long as his orchard is free from the pest. The 

 medical fraternity has quite recently demonstrated its ability to 

 not only control, but to exterminate entirely, yellow fever, but no 

 community of intelligent citizens would purposely permit the in- 

 troduction of this disease simply because it can be controlled by 

 the physicians. The same logic applies with equal force to the 

 introduction of serious diseases and insect pests of fruit and 

 other crops. 



