671 



Bacterium tumefaciens, flagella, 459 

 geographical distribution of, 413 

 grov/th on or in 



agar, 426 



bouillon, filaments and stringing 

 threads in, 426 



Cohn's solution, 426 



gelatin plates, 426 



litmus milk (blued), 426 



milk, casein slowly separated, 

 426 



potato, 426 



Uschinsky's solution, 426 

 host plants, 430 



how distinguished from sapro- 

 phytes in media, 438 

 inoculation experiments, 438, 449 

 involution forms, 428, 460 

 isolation from diseased tissues, 



432, 433, 438 

 lab forming, 426 

 literature, 471 

 may live in soils, 3.5 

 mitochondria (?) confused with, 



419 

 non-liquefying, 421 

 non-nitrate reducing, 421 

 non-starch destroying, 421 

 occurs in tumor in small numbers, 



433 

 plate cultures directly from tumor 



often develop slowly, 433 

 saprophytes accompanying, 432 

 sensitive to acids and alkalies, 426 

 sensitive to germicides, 428 

 serological reactions, 457 

 several strains of, 457 

 staining of, 466, 468 

 temperature relations, 426 

 transmitted by nursery stock, 469 

 type of tumors produced by, 413 

 virulence lost slowly, 428, 469 

 virulence of colonies from tumors 



variable, 468 

 Bacterium vascularum Cobb, 473 



dwarfing and distortion of sugar 



cane infected with, 49 

 how avoided in New South Wales, 73 

 Bacterium viridilividum Nellie A. 

 Brown, cause of lettuce spot, 36 



Bacterium woodsii EFS, 16, 473 



method of infection, 16 

 Balances, 78 



Banana, bacterial disease of, 473 

 figure illustrating, 11 



Panama disease, 52 



rot of, in Philippines, 54 

 in Sandwich Islands, 64 

 Bark tumors in rubber trees (Hevea), 



478 

 Barley, bacterial blight of, 55, 473 

 Basal glume rot of wheat, 55. (See 



Bacterium atrofaciens.) 

 Basal stem rot and tuber rot of potato, 



253. (See Bacillus phytophthorus 



and black rot of potato.) 

 Basket willow, bacterial disease of, 53, 



474 

 Bean, bacterial spot of. (See Bean, 



blight of.) 

 Bean-blight, 280. (See also Bacterium 

 phaseoli.) 



appearance of disease, 282 



bacterial crusts and cirri in, 282 



care of inoculated plants, 290 



causal organism oozing from tissues, 

 282 



chiefly parenchymatic, 280 



chlorophyll may persist around leaf 

 spots, 282, 283 



color changes in diseased plants, 282 



control of, 299 



description of causal organism, 285 



discolorations in, 282 



distortions due to, 282, 283 



dwarfings due to, 283 



etiology, 285 



figures illustrating, 280-288 



first signs of the disease, 282 



geographical distribution, 54, 55, 284, 

 285 



Halsted's observation, 296 



histology, figures illustrating, 289, 

 290, 291, 292 



host plants, 280 



inoculation experiments, 288 



isolation of causal organism, 287 



late stages of the disease, 282, 283 



literature, 299 



pathogen seed-borne, 297 



