SUBJECT INDEX TO MAINE APPLE DISEASES. 



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INTRODUCTION 380 



CHARACTER AND CAUSES OF APPLE DISEASES 382 



NON-PARASITIC DISEASES 384 



Winter inj ury 384 



Crotch injury 386 



Frost bands on the fruit 386 



Frost inj ury of the leaves 387 



Protecting orchards from frost 388 



Russeting or spray injury of fruit 388 



Leaf spot 39° 



Baldwin spot 392 



Hail injury 393 



Stag horn 393 



Lichens on apple trees 394 



PARASITIC DISEASES 395 



Diseases of Foliage and Fruit 395 



Scab 395 



Cylindrosporium fruit spot 398 



Sooty blotch and Fly-speck 400 



Sphaeropsis leaf spot 401 



Rust 402 



Powdery mildew 403 



Fruit Decays 404 



Black rot 404 



Penicillium or Blue mold decay 405 



Bitter rot 406 



Brown rot 406 



Pink rot 407 



Alternaria decay 407 



Botrytis decay 407 



Phoma decay 408 



Hypochnus decay 408 



Fusarium decay 408 



Verticillium decay 409 



Endomyces decay 410 



Rhizopus decay 410 



Other apple rots 410 



Diseases of the Wood 411 



Canker and Twig-blight 411 



Sphaeropsis canker 414 



Bitter-rot canker 415 



Myxosporium canker 415 



Coryneum and Phoma cankers 416 



Cytospora canker 416 



Blight (bacterial) canker 417 



Crown gall 417 



Wood destroying fungi 418 



28a , 



