xiv Contents 



CHAPTEE IX 



PAGES 



Fertilizing the Commehcial Apple Oechaed . . . 186-205 



Present practices in fertilizing 187-188 



Value of stable manure 188-189 



•Experiments with fertilizers 189-198 



Eesearch work of Kraus and Kraybill . . . 189-191 



Experiments in Pennsylvania 191-195 



Nitrate experiments by Lewis 195-198 



Amount of fertilizer to a tree 198-199 



Needs of irrigated regions 199-200 



Nitrate of soda 200 



Methods of applying fertilizers 200-202 



Pruning with reference to fertilizing . . . . 202 



Fertilizer tests 202-203 



General summary and specific recommendations . 204-205 



CHAPTEE X 



Diseases and Pests of the Apple and Theie Control 206-248 



Important insect enemies of the apple .... 206-216 



| The codlin-moth 206-210 



. San Jose scale 210-211 



Oyster-shell scale 211 



Apple aphids 211-213 



\ Plum curculio 213 



'Apple red bugs 214 



' l Apple-tree tent-caterpillar 214 



Eound-headed apple-tree borer ..... 214-215 



Cutworms 215 



X<Bud-moth 215 



^ The fruit-tree leaf-roller 215-216 



Important apple diseases 216-223 



Apple-scab 216-217 



Apple-blotch 217 



Sooty-blotch and fly-speck 217 



Cedar-rust 218 



„ Bitter-rot 218-219 



