JUNIPER DISEASES 



205 



Symptoms. 



The wood of the juniper is characteristically affected. Long 

 cyHndrical and pointed pockets of brown charcoal-like decayed 

 wood are formed. At first these pockets are more or less sepa- 

 rated and vary from one to several feet in length. Later they 

 may increase in diameter 

 and merge with neighboring 

 pockets, forming large irregu- 

 lar decayed areas. The de- 

 cayed wood in juniper is 

 dark brown but in other 

 trees may be lighter if the 

 normal wood is light colored. 

 It breaks into cubes and is 

 easily powdered. With a 

 knife blade the charcoal-like 

 cubes may be scraped from 

 the cavity, leaving it smooth. 

 The wood around these cavi- 

 ties is normal and of the 

 natural color. 



The fruiting-bodies of the 

 causal fungus on juniper are 

 produced in the holes in the 

 trunk where branch stubs are 

 inclosed. They conform to 

 the size and shape of the 

 hole. When formed on logs, 

 they vary from thin shelves to thick hoof -shaped rose- 

 colored bodies which are usually small (Fig. 34). The 

 upper surface may become black with age while the mar- 

 gin and under surface of newly formed pores is pinkish 

 red. The internal- structure is flesh-colored or pinkish. 



Fig. 34. — Fruiting-bodiea of Fames 

 roseus. 



