98 BIGGI.K ORCHARD BOOK 



Scab : Somewhat similar to apple scab. Bordeaux. 



MISCELLANEOUS TROUBLES. Crown Gall: See 

 Chapter III. 



Gum : Caused by borers, bruises, and fungus. 

 Common on peach, cherry and plum trees. 



" Little Peach " : Very little is known of this dis- 

 ease, and it is as yet common in only a few localities. 

 The name is quite expressive of the symptoms ; the 

 fruit remains small and tough, the tree seems un- 

 healthy, the leaves seem smaller than is natural, and 

 finally the tree dies. The disease spreads from one 

 tree to another. The only known remedy is to pull 

 out the infected trees at once, and burn them. 



Peach ' * rosette " is a disease of the peach in the 

 southern states. Its effects on the tree are similar to 

 those of yellows, and, like that disease, it is to be 

 controlled only by the destruction of affected trees. 



Sun-scald : Consult Chapter IX. Some folks call 

 this trouble ' 'frost- crack " when it occurs during 

 freezing weather. 



* ' Sun-scorch ' ' of foliage sometimes occurs during 

 a drouth, or when hot, dry winds blow. Regular 

 cultivation is a partial preventive of sun-scorch. 



' ' Yellows ' ' : This is probably the most serious foe 

 that the peach grower has to contend with, unless 

 it be the San Jose scale louse. It is a communicable 

 disease ; it is always fatal within a few years ; and it 

 attacks both old and young trees, and seemingly has 

 an especial fondness for healthy, vigorous trees. No 

 cure is known, and the exact nature of the disease 

 has not yet been determined. In bearing trees the 

 premature ripening of the fruit is one of the first 



