X CONTENTS 



PAGE 



Galls 63 



Wood-rots 64 



CHAPTER IV 



Root Diseases and Injuries 72 



Drying and drowning 73 



Freezing-to-death 74 



Gas-injury 76 



Shoe-string root-rot 78 



Mycorhizas 82 



Roots parasitized by flowering plants 84 



CHAPTER V 



Alder Diseases 86 



Powdery mildew of catkins 86 



Catkin-deformation 87 



Brown checked wood-rot . . 87 



Common white wood-rot 87 



Root-tubercles 88 



CHAPTER VI 



Arbor-viTjE Diseases 89 



Seedling-blight 89 



Leaf-blight 90 



Brown pocket heartwood-rot 91 



Red-brown root- and butt-rot 91 



CHAPTER VII 



Ash Diseases 93 



Leaf- and twig-rust 93 



White heartwood-rot 95 



CHAPTER VIII 



Bald Cypress Diseases 97 



Pecky heartwood-rot 97 



