CONTENTS 
CHAP. 
I. INTRODUCTION. 
The relation of a fungus to its host. Life-history of a fungus’. 
The morphology of the larch ; = and dwarf shoots ; internal 
structure of the stem ‘ 4 . i 
II. THE LARCH CANKER. 
General. Historical. The mycelium of Dasyscypha calycina 
and its effect on the tissues. The canker as a amici 
structure . . . : . e 
III. THE LARCH CANKER (continued). 
The reproductive organs of the fungus. Germination of spores. 
Pure cultures on nutrient media. Artificial infection with canker 
IV. THE LARCH CANKER (concluded). 
On the mode of infection in nature. Importance of wounds as a 
source of canker. Contributory causes of canker. Methods of 
prevention. The synonymy of Dasyscypha calycina 
V. HEART-ROT. fFomes annosus. 
Various fungi which cause heart-rot. Fomes annosus: general ; 
historical. Secretions induced by Fomes annosus: turpentine 
and resin ; soluble gum ; insoluble gum. Decomposition of the 
wood . ‘ . A . ‘i . . . . 
VI. HEART-ROT. Fomes annosus (concluded). 
Reproductive organs: fructifications; conidiophores. Pure 
cultures on artificial media. Cultures on natural media. Infec- 
tion experiments. Mode of attack in nature. The frequency 
of heart-rot in plantations which form the first rotation on culti- 
vated soil. Methods of prevention é e F ‘ F 
Vil. HEART-ROT CAUSED BY OTHER FUNGI. 
Polyporus Schweinitzii, Poria vaporaria, es iia 
reus, Trametes Pini. 7 é . 
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