678 



INDEX 



Fire-blight, resistant varieties of pears, 



377, 383, 386, 387 

 Sackett's studies of, 363 

 secondary infections, 363 

 soils favoring development of, 



383 

 susceptible varieties of plants, 



377 



transmission by aphids, 384 

 transmission by bees, 384 

 transmission by birds, 384 

 transmission by pruning tools, 



384 



type of disease, 359 

 varieties of pears immune to, 



386, 387 

 Waite's studies of, 25, 359, 360, 



372 



waterpore infections, sus- 

 pected, 384 



water sprouts favor, 384 

 Fire-heated soil, 73 

 Fish, tumors in, 36 

 Fixative, Carnoy, 115 

 Flagella, staining of, 118 

 Flemming's triple stain, 117 

 Flowers, infection through, 16 

 Forcing plants, by ether, by cold, and 



by warm bath method, 622, 623 

 Formaldehyd, method of use for con- 

 trol of plant diseases, 69 

 Formalin treatments, 69, 71, 73 

 Formic acid, tumors formed on plants 



by, 483 

 figures illustrating, 498, 499, 500. 



501 



France, bacterial diseases in, 66 

 Fraxinus excelsior, tumors on, 391, 394 

 Freezing, tumors due to, 485 



figures illustrating, 504, 505 

 Fundamental doctrine of science, 640 

 Fungi followed by bacteria, 34 

 Fungus infested soils, 114 

 Fusarium cubense EFS, cause of the 



Panama banana disease, 52, 54 

 Fusarium sp., following crown gall, 34 



GALL formation, theory of, 549 

 Gas production, by bacteria, 36. 

 also Bacteria in plants.) 



(See 



Gelatine, used for culture media, 105 

 Generic names, how used in this book, 



132 



Germany, bacterial diseases in, 64 

 Germicidal sprays, 74 

 Germicides, use of, in isolating bacteria 



from tissues, 107 

 Giant cells, 543, 545, 550, 565 

 Glassware, in common use in plant 



pathology, 77 

 Glomerella gossypii (Southw.) Edger- 



ton, 321 



Gram's stain and variants, 117 

 Grand Rapids disease of tomato, 202. 



(See Aplanobacter michiganense.) 

 Grape, crown gall on, 417 



intumescences on leaves of, 496 

 Grass, western wheat-, disease of, 47, 



473 



Great Britain, bacterial diseases in, 64 

 Gummosis of cotton, 314. (See Bac- 

 terium rnalvacearum.) 



HAIL stones, infection through wounds 



due to, 15, 385, 410 

 Half-tones, preparation of, 122 

 Hand lens, Zeiss, 86 

 Herbarium specimens, care of, 119 

 Heterodera radicicola Greef, cause of 



galls, 543 

 Hevea brasiliensis Muell., brown bast 



disease of, 52, 476, 478 

 Holland, bacterial diseases found in, 62 

 Honing, on transmission of tobacco in- 

 fection by well water, 21 

 Hot air treatment of seed, 69 

 Houser cabbage, disease resistant, 149 

 Hutchinson (C. D.), disease of wheat in 



Punjab, 47 

 Hyacinths, Wakker's disease of, 473 



yellow disease of, in Holland, 62 

 Hyaloplasm, paralysis of, and tumor 



formation, 553 

 Hybridization as a means for control 



of plant diseases, 75 

 Hyperplasias in plants, chemicals a 



cause of, 483, 551, 563 

 formed non-parasitically on potato, 



502 

 freezing a cause, 485 



