DANGEROUS INTERNATIONAL FOREST TREE DISEASES 7 



10,000 ft., sometimes ascending to 12,000 ft., and descending to 

 4,000 ft. Absent in Sikkim and many areas in Kumaon. 



Armillaria mellea (Vahl.) Quel. (X) 



Capnodium pini Berk. & Curt. (X) 



Coleosporium barcl-ayense Bagchee (XX) 



A heteroecious rust, and I on 5-needled blue 

 pine. II and III on Senecio >pp. 

 Cronartium ribicola Fischer (XX) 



A heteroecious stem rust, and I on 5-needled 

 blue pine. II and III on Ribes. 

 Fomes annosus (Fr.) Cke. (XX) 



Fames fomentarius (L. ex Fr.) Kickx (X) 



On dead wood. 

 Fomes pini (Thore) Lloyd (XXX) 



Lophodermium pinastri (Schrad.) Chev. (X) 



Causes needle cast. 

 Melampsora oblong a Bagchee (X) 



Causes needle rust. 

 Polyporus schweinitzii Fr. (X) 



On dead wood. 

 Polyporus tomento8us Fr. (X) 



The fungus occasionally attacks blue pine. 

 The parasitic form is referred to as P. 

 tomentosus var. tire hiatus. 



Populus 



There are six species of poplars in India, either indigenous or in- 

 troduced of which Populus ell lata Wall, and P. euphratica Oliv. are 



the most important. The others, like P. nigra Linn, and P. alba Linn., 

 are planted for shade or ornament or are quite local. 



1. Populus alba Linn. Distribution : Western Himalayan at 

 4,000-10,000 ft. extending west to Europe, in the Mediterranean 

 and north to Siberia. 



Melampsora rostrupii G. Wagner (X) 



II and III on undersurface of leaves; I is not 

 known in India. 



2. Populus eiliata Wall. Distribution : Himalayan from Kash- 

 mir to Bhutan, at 4,000-10,000 ft. 



Boerlagella effusa Syd. and Butler (X) 



On wood and decorticated branches. 

 Oytospora chrysosperma (Pers.) Fr. (XX) 



On branches. The Oytospora stage flourishes 

 best during a wet summer. The Valsa stage 

 may be found in plenty on the thicker 

 branches in autumn. 

 Fomes fomentarius (L. ex Fr.) Kickx (X) 



Linospora popvlina (Pers.) Schr. (X) 



On leaves. 

 Melampsora eiliata Bare. (X) 



II and III on undersurface of leaves; I is not 

 Nectria cinnabarina (Tode) Fr. (XX) 



On branches. 

 TapJirina aurea (Pers.) Fr. (X) 



On leaves. 



