INDEX. 



303 



Pace. 



Stock, Italian disease 277 



(See also Bacterium matthiolae.) 



browning of tissues 277 



infection, manner of 279 



inoculations 278 



literature 279 



losses 277 



microscopic appearance of diseased tissues 278 



morbid anatomy 277 



parasite, description 278 



(See Bact. matthiolae.) 



parts of plant attacked 277 



progress of disease 277, 278 



seed-disinfection 279 



seed-selection 279 



signs of disease 277 



tissues attacked 277 



treatment 279 



Sugar-beets, disease described by Sorauer in Germany 154 



Sugar-beets, English disease of 154 



Sugar=cane, 



arrowing 19, 20 



chlorosis 81 



(See also Sugar-cane, Pokkah-bong; Sugar-cane, top- 

 rot.) 



effect of copper sulphate on 76 



gum formation 81 



(See also Sugar-cane, Cobb's disease, and Sugar-cane, 

 Sereh.) 



mean temperature required for growth of 4 



Sugar=cane, Cobb's disease of 3 



(See also Bacterium vascularum.) 



acidity of cane, effect on susceptibility 47 



acidity of cane-juice, relation to bacterial growth . 4 7 



adventitious roots 52 



aeration and pigment stain 16 



bacteria dormant or dead in cane . . . 30, 31, 46, 54, 65 

 bacteria first discovered in connection with disease . 3 



bacteria, location in tissues 6, 15, 24, 52 



bacterial ooze from leaves and stem . . 16, 22, 25, 53, 66 



bacterial ooze, great abundance of 26 



bacterial slime, identity with gum 13 



(See also slime, gum and vasculin.) 



Bacterium vascularum, description .54 



(See also Bact. vascularum.) 

 Boname's studies, 



geographical distribution 3 



signs of disease 10 



reduction of sugar-content 15, 63 



bundles, mottled red and yellow 16, 26, 27, 41 



cavities formed in soft tissues 5, n, 15, 26, 52 



check pricks, result of 28, 32 



cirri from cut bundles 6, 30, 32 



clarification of sugar hindered by 3 



climate, effect on disease 4 



Cobb's studies, 



(See also Bact. vascularum.) 



earliest appearance of disease 5 



effect of moisture 49 



geographical distribution 3, 5 



inoculation experiments 8, 1 2 



pecuniary losses in Australia and New South 



Wales 70 



crystallization, effect on 9 



decay of terminal bud 3, 5, 15 



definition of the disease 3 



destruction of bundles in 53 



discoloration of tissues 3, 4, 5, 11, 12, 15, 16, 18 



disease not air-borne 68 



drainage, partial remedy for 49, 68, 70 



Dranert's studies in Brazil 3, 70 



dwarfing 3, 15, 22, 27 



earliest appearance of disease 3,5 



early signs of disease 34, 35, 36, 37 



etiolation in 3, 10, 18 



etiology 21 



Page. 

 Sugar-cane, Cobb's disease of continued. 



geographical distribution of. .... 3, 4, 5, 9, 10, 1 1, 13, 14 

 gum, 



(See also vasculin.) 



chemical reactions 7, 13, 14 



chemical reactions compared with those of bac- 

 terial slime from cultures 13 



comparison with the mucins 14 



component parts 7 



dissemination in tissues 6, 10, 15 



identity with bacterial slime 13 



nature and origin of 7, 8, 13 



ooze from leaves and stem 16, 22, 25, 53, 66 



separation from bacteria by filtration 13 



signs of the disease 3, 15 



Boname's observations 10 



Cobb's observations 5, 6, 8 



Dranert's observations 4 



Tryon's observations 12 



gummed cane, means of detecting 6, 69 



microscopic appearance of 6, 24, 52 



gumming of machinery 3,6 



gumming of terminal shoot 16, 25, 26 



gumming, signs of 3, 6, 15 



(See also signs of disease.) 



history 3 



host-plants 3 



hyperplasias not present 52 



immunity, cause of 47 



infectious nature 48 



intercelluar spaces, occupation by bacteria 53 



inoculations 8, 1 2, 2 1 



(See also Bacterium vascularum.) 

 isolation of Bact. vascularum from 



artificially infected canes 21 



naturally infected canes 21 



juice of gummed cane, recognition of 6 



lime, use of, in clarification 6, 9 



literature 71 



leaves, pale stripes on 23 



local signs not followed by general infection. . . 27, 38, 



4. 42. 43. 46 



losses due to 4, 6, 70 



microscopic appearance of gummed cane ... 6, 24, 52 



moisture, effect of 4, 49, 70 



morbid anatomy 52 



most disease on best land 69 



nodes, red pigment most abundant in or under. 16, 26 



odor of 27 



organisms associated with Bact. vascularum in 



badly diseased cane 21, 23 



parasite, description of 54 



(See also Bact. vascularum.) 



parenchyma, cause of comparative immunity. ... 48 



pecuniary losses 70 



Pernambuco disease 9 



crystallization, effect on 9 



cultivation of cane, primitive method 9 



gum in 9 



preventive measures 10 



resistant varieties 10 



signs of 9 



susceptible varieties 9 



theories regarding cause 9 



weather conditions, effect of 10 



pigment, red 1 6, 53 



(See also red stain.) 



plant-cane, signs of gumming in 6 



planters responsible for spread of disease 68 



polvillo, points of resemblance 85, 88 



premature 



blossoming 20 



development of axillary buds 11, 12, 16, 25, 52 



drying up of attacked cane 9, 15 



ripening 20 



ratoons, signs of gumming in 6 



