UNITED STATES 1)EPARTMENT OF AGRICULTURE 

 BULLETIN No. 1112 



Washington, D. C. T December 21, 1922 



THE WESTERN 

 YELLOW PINE MISTLETOE 



EFFECT ON GROWTH AND 

 SUGGESTIONS FOR CONTROL 



By 



CLARENCE F. KORSTIAN, Forest Examiner, Appalachian Forest 



Experiment Station, Forest Service, and W. H. LONG, Forest Pathologist, 



Office of Investigations in Forest Pathology, Bureau of Plant Industry 



CONTENTS 



Page 



Introduction 1 



Fliyslcal and Climatic Fsattirea of the R^gXoa 2 



The Western TeUow Pine Mistletoe 8 



Effect of Mistletoe on Growth of Boat 4 



Effect on Longevity of Host . . . . , 22 



Effect of Mistletoe on Merchantability of Timber 2S 



Effect of Mistletoe on Seed Prodaction of Host 25 



SIlTicaltural Aspect of Mistletoe Infection 39 



Control of Mistletoe 80 



Sammary S4 



WASHINGTON 



GOVERNMENT PBINTING OFFICE 



1922 



