276 



THE MONTHLY BULLETIN. 



exactly as white pine had done before, and just as the blister rust was brought into 

 America in shipments of young living white pines, the disease may at any time be 

 introduced into the western forests on nursery stock coining from an infected terri- 



Fig. 82. — Chestnut bark disease. The main 

 stem of the chestnut plant has been artificially 

 inoculated with Endothia parasitica. The result 

 of the infection is shown in the drooping and 

 shriveling of the foliage. (U. S. Department of 

 Agriculture, Yearbook 1912, PI. 37.) 



lory. In this way a single diseased white pine introduced into a nursery, cemetery, 

 private garden or park of the West may become the starting point for an epidemic 

 of disastrous consequences. A similar danger threatens from the importation of 

 living currants and gooseberries. 



