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20. 
ILLUSTRATIONS 
. Apple-scab on leaves (after Wallace) 
Apple-scab on fruit 
Cluster of scabby apples 
. Apple-scab on young fruits 
Bitter-rot of apples 
. Bitter-rot cankers 
. Stippen, or bitter-pit . 
. Frost-injured apple-tree  . : é 3 
. Apple-tree showing crotch-injury 
‘Black-rot of apple. Early stages 
. Black-rot mummy * 
. Leaf-spot of apple 
. Black-rot canker . 
. Apple-blotch, early stage . 
. Apple-blotch, late stage 
Apple-blotch cankers 
Apple-rust on leaves . 
Cedar-apples, winter condition . 
. Cedar-apples, spring condition . 
Fruiting body of the white heart-rot patliogene 
. White heart-rot ; cross-section of an affected limb 
. Blister-canker, apple . 
. Northwestern anthracnose cankers 
. Apple fruit-spot 
Soft-rot, or blue-mold 
. Armillaria root-rot (after Dourines) 
. Armillaria root-rot fungus ; rhizomorphs and young Arpanuhards 
. Sooty-blotch of apple E 5 A ‘ 
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