xii CONTENTS 



PAGE 



Common white wood-rot 124 



Brown checked wood-rot 124 



CHAPTER XIV 



Catalpa Diseases 125 



Yellowish wood-rot 125 



Brown butt-rot 127 



CHAPTER XV 



Cedar Diseases 129 



Eastern leaf-rust 129 



Western leaf-rust . . ' 130 



Brown felt-blight 130 



Eastern witehes'-broom 131 



Western twig-blight and witches'-broom 133 



Branch-swellings 134 



Pecky heartwood-rot 135 



CHAPTER XVI 



Chestnut Diseases 138 



Large leaf-spot 139 



Twig-blight 140 



Endothia canker 140 



Strumella canker 148 



Brown checked wood-rot 149 



Straw-colored heartwood-rot 149 



White piped butt-rot 150 



CHAPTER XVII 



Elm Diseases 152 



Leaf-spot 152 



Powdery mildews 153 



Brown wood-rot 154 



CHAPTER XVIII 



Fir Diseases 155 



Leaf blister-rusts 155 



