208 MANUAL OF TREE DISEASES 



References on White Pocket Heaktwood-Rot 



Schrenk, Hermann von. White rot of the red cedar (Polyporus jnni- 

 perinus n. sp.)- In Two diseases of red cedar, caused by Poly- 

 porus juniperinus n. sp. and Polyporus cameus Nees. U. S. 

 Dept. Agr. Div. Veg. Phys. and Path. Bui. 21 : 9-16, pis. 1-t, 

 figs. 1-2. 1900. 



Hedgeock, G. G., and Long, W. H. Preliminary notes on three rots 

 of juniper. Mycologia 4 : 109-114, pis. 64r-65. 1912. 



Yellow Wood-Rot 



Caused by Fames Earlei (Murrill) Sacc. ( ? = Fames juniperinus 

 Schrenk) 



This wood-rot is similar lq appearance to the white heartwood- 

 rot of the red juniper. The yellow wood-rot occurs more or less 

 commonly in Arizona, New Mexico, Texas and Colorado in 

 mountain, one-seed and Utah juniper. The rot is most de- 

 structive in New Mexico, and at times the tree is so weakened 

 that it breaks over. 



Symptoms. 



Long longitudinal holes several inches in diameter are formed 

 in the heartwood. The holes are partially filled with decayed 

 wood matted together with light brown mycelium. The wood 

 around the holes is yellowish or light brown in color. Both the 

 heartwood and sapwood may be invaded and destroyed, al- 

 though the holes are usually confined to the heartwood. 



The sporophores of the causal fungus are attached to the 

 affected tree. They emerge from the fiurows or depressions 

 in the bark, usually within ten feet of the ground. They are 

 hoof-shaped to cylindrical, woody bodies, brownish to black 

 and deeply checked on top and yellowish beneath. The 

 inner substance of the sporophore is brownish or orange- 

 yellow. The pores on the under siu-face are rather large and 

 circular. 



