INDEX 



ACETIC acid tumors, 483, 555 



figures illustrating, 488, 490, 491 



492, 493, 494, 495, 555 

 hypertrophy only in early stages, 



of, 555 



origin of cells of, 555 

 substomatal injury preceding, 



503 



Acids, found in fruits, table of, 13 

 increase of, in tumor-forming tissues, 



531, 543 



Adventitious buds, 50, 419, 574-630 

 Agar used for culture media, 105 

 Air in tissues, how removed, 295 

 Alcoholic material, care of, 120 

 Aldehyd, tumors formed on plants by, 

 483 



figures illustrating, 497 

 Alfalfa 



bacterial disease of, 55, 474 

 white spot (physiological disease), 55 

 Amenities of research, 651 

 Ammonia, tumors formed on plants by, 



483, 553 



figures illustrating, 486, 487 

 loss of water precedes forma- 

 tion of, 489 



theoretical action of, 567 

 Angular leaf-spot 



of cotton. (See under Cotton) 



55, 314 

 of cucumber. (See Bacterium 



lachrymans), 

 Animal and human pathology, useful 



to plant pathologists, 635 

 Ants, control of, 109, 114 

 Aplanobacter, morphology of, 35, 132 

 Aplanobacter agropyri O'Gara, 47, 473 

 Aplanobacter michiganense EFS, 202 

 behavior on various media, 206 

 cause of bacterial canker of tomato, 

 202 



663 



Aplanobacter michiganense EFS, char- 

 acters of, 205 



geographical distribution of, 205 

 in both field and hothouse, 202 

 infectious nature of, 219 

 isolation difficult, 206, 207 

 literature, 222 



meristematic tissues attacked, 207 

 method of obtaining pure cultures, 



207 



phloem infected by, 202, 208, 209 

 resemblance on cooked potato to 



Bacterium campestre, 206 

 seed-infection, 202, 216 

 sensitiveness to acids, 211, 217 

 stomatal infections, 202 

 Aplanobacter rathayi EFS, 473 



distortions in infected plants, 49 

 resistance to sunlight and drying, 



36 

 Aplanobacter sepedonicum (Spk.) EFS, 



207, 474 



Aplanobacter Stewarti (EFS) McC., 

 (See also Stewart's disease of 

 maize.) 



characteristics of, 160 

 colonies of, 172, 173 

 color changes in infected corn 



plants, 49, 162 

 cultural characteristics, 161 

 description of, 161 

 host plants, 167 

 inoculation methods, 165 

 literature, 176 

 morphology of, 161 

 most susceptible age of host, 8 

 resistance to drying, 36 

 ^seed-borne, 161, 174, 176 

 technic for obtaining pure cultures 



of, 163 



temperature relations, 161 

 varieties of maize sensitive to, 167 



