CONTENTS 



XUl 



PAQE 



Leaf-rusts 159 



Leaf-cast 159 



Rust witches'-broom 160 



Gray mold twig-blight 161 



Mistletoe burl and witches'-broom 163 



Pecky wood-rot 163 



Red-brown sapwood-rot 165 



Stringy red-brown heartwood-rot 166 



Brown pocket heartwood-rot 168 



Brown heartwood-rot 169 



Brown root- and butt-rot 169 



Red-brown root- and butt-rot 170 



Yellow root-rot 170 



CHAPTER XIX 



Hackberry Diseases 173 



Powdery mildews 173 



Witches'-broom 174 



CHAPTER XX 



Hemlock Diseases 

 Seedling root-rot 

 Leaf-blight 



Brown-mold leaf-blight 

 Leaf and cone blister-rusts 

 Leaf-, cone- and twig-rusts 

 Red-brown sapwood-rot 

 Stringy red-brown heartwood-rot 

 Brown pocket heartwood-rot 

 Cuboidal wood-rot 

 Red-brown root- and butt-rot 



177 

 177 

 179 

 180 

 180 

 182 

 184 

 184 

 184 

 185 

 187 



CHAPTER XXI 



Hickory Diseases 188 



Leaf-mildew and witches'-broom 188 



Common white wood-rot 189 



