FUNGUS GROWTH ON TREES 101 



(Lophodermium pinastri) is a well-known and 

 widely distributed species, and is usually found 

 on the Scotch and Austrian pines. The leaves, 

 when attacked, wither suddenly and fall off, 

 the fungus being most prevalent after unusually 

 dry weather, or in early spring succeeded by 

 a frosty winter. It occurs both as a saprophyte 

 on dead pine leaves and as a parasite on the 

 living foliage. We have been most successful 

 in combating the attacks and preventing the 

 spread of the pest by spraying the affected 

 parts with " Bordeaux mixture." Young trees 

 under ten years of age are most commonly 

 attacked, and when this occurs in the nursery 

 borders, the plants should be rooted out and 

 burned. On several Scottish and English 

 estates thousands of Scotch pines have been 

 killed out by the attacks of the leaf-shedding 

 fungus. 



Next to the larch canker, one of the most 

 destructive diseases of forest trees is caused 

 by attacks of the bladder-rust or cluster-cup 

 (Peridermium pinia cicola ) . It is a wound fungus 

 and attacks almost every species of pine, the 

 Scotch in particular, and especially when the 



