392 MAINE AGRICULTURAL EXPERIMENT STATION. IQIO. 



SUBJECT INDEX. 



PAGE 



INTRODUCTION 337 



CHARACTER AND CAUSES OF APPLE DISEASES 339 



NON-PARASITIC DISEASES 341 



Winter inj ury 341 



Crotch inj ury 344 



Frost bands on the fruit 344 



Frost injury of the leaves 344 



Protecting orchards from frost 345 



Russeting or spray injury of fruit 346 



Leaf spot 348 



Baldwin spot 349 



Hail injury 351 



Stag horn 351 



Lichens on apple trees ., 351 



PARASITIC DISEASES 352 



Diseases of Foliage and Fruit 352 



Scab 352 



Cylindrosporium fruit spot 356 



Sooty blotch and Fly-speck 358 



Sphaeropsis leaf spot ." 358 



Rust 360 



Powdery mildew 361 



Fruit Decays 361 



Black rot 362 



Penicillium or Blue mold decay 363 



Bitter rot 363 



Brown rot 364 



Pink rot 364 



A l*^ernaria decay 3^5 



Botrytis decay 3^5 



Phoma decay 3t>S 



Hypochnus decay 366 



Fusarium decay 366 



Verticillium decay Z^l 



Endomyces decay Z^l 



Rhizopus decay 368 



Other apple rots ; 368 



Diseases of the Wood 368 



Canker and Twig-blight 368 



Sphaeropsis canker 372 



Bitter-rot canker Z7Z 



Myxosporium canker • Z72) 



Coryneum and Phoma cankers 374 



Cytospora canker 374 



Blight (bacterial) canker 374 



Crown gall • 375 



Wood destroying fungi 2>7^ 



Orchard Sanitation, Sprays and Spraying 377 



Preparation of Sprays 379 



Bordeaux mixture • 3^0 



Lime-sulphur sprays • > • . 384 



When to Spray and What to Use 39© 



How TO Spray 391 



