DANGEROUS INTERNATIONAL FOREST TREE DISEASES 13 



Fomes annosus (Fr.) Cke. (XX) 



Damage is not significant, except in very moist 

 localities. 

 Fomes pini (Thore ex Fr.) Karst. (XXX) 



A serious disease causing heart rot. 

 Fomes pinicola Swartz. ex Fr. (XX) 



Attacks standing trees, causing brown cubical rot. 

 Leptostroma ahmadii P&tr. (X) 



On needles. 

 Lophodermiwn pini-excelsae Ahmad (X) 



Causes needle cast in moist and shady localities. 

 Peniophora gigantea (Fr.) Mass. (X) 



On dead wood. The fungus is a primary colonizer 

 of dead stumps in preference to Fomes annosus 

 (Fr.) Cke. 

 Polyporus gilvus (Schw.) Fr. (X) 



On roots, rare. 

 Polyporus schweinitzii Fr. (XX) 



Causes butt rot. 

 Polyporus versicolor (L.) Fr. (X) 



Causes white spongy rot. (X) 



Stereum purpureum Pers. (X) 



Wound parasite. Causes white spongy rot. 



Quercus 



The genus Quercus, in Pakistan, is represented by 5 species: (1) Q. 

 dilatata Lindl., (2) Q. ilex Linn, (3) Q. incana Roxb., (4) Q. seme- 

 carpi folia Smith, (5) Q. gluca. The diseases of the first four are given 

 below. 



1. Quercus dilatata Lindl. 

 Amphisphaeiia fall-ax de Not. (X) 



On bark. 

 Colpoma quercinum Wallr. (X) 



Coryneum umbonatum Nees (X) 



Causes girdling of twigs. 

 Dasyscypha indica (Cash) Ahmad (XX) 



Causes canker on which fruit bodies appear. 

 Discosia atrocreas Tod. ex Fr. (X) 



Causes leaf spot. 

 Fistulina kepatioa Huds. ex Fr. (X) 



Fomes fomentarius (L.) Fr. (XX) 



Wound parasite. Causes white spongy rot. 

 Fomes pectinatus Klotz. (X) 



Causes white pocket rot in oak. 

 Fomes rhnosus Berk. (X) 



Fomes torulosus Pers. ex Lloyd (X) 



Causes heart rot. 

 Ganoderma applanatum (Pers.) Pat. (X) 



Ganodermalucidum (Leyss.) Karst. (XX) 



Num mu I aria b u lliard I Tul . (XX) 



Causes dieback. 

 Penzigia que re-am Mueller and Ahmad (X) 



Polyporus cuticularis Bull, ex Fr. (X) 



Causes heart rot. 



