154 ORDER I. PSEUDOMONADALES 



B. Gelatin not liquefied. 



1. Starch hydrolyzed. 



2. Starch not hydrolyzed. 



C. Gelatin not reported. 

 1. Starch hydrolyzed. 



51. Xanthomonas axonopodis. 



52. Xanthomonas oryzae. 



53. Xanthomonas celebensis. 

 II. Colonies whitish to cream; pigment non-water-soluble. 



A. Gelatin liquefied. 

 1. Starch hydrolyzed. 



a. Nitrites produced from nitrates. 



54. Xanthomonas panici. 



aa. Nitrites not reported. 

 2. Starch not reported. 



55. Xanthomonas proteamaculans . 



56. Xanthomonas manihotis . 



57. Xanthomonas ruhrisuhalhicans 



58. Xanthomonas cannae. 



59. Xanthomonas conjac. 



60. Xanthomonas zingiberi. 



HOST PLANT KEY 



The following key will be found useful for purposes of identification where the bacterium 

 is isolated from a known host plant. 



I. Cause of leaf, stem and fruit spots and occasional blights of monocotyledonous plants. 



A. Attack members of the family Araceae. 



59. Xanthomonas conjac. 



18. Xanthomonas dieffenbachiae. 



B. Attacks members of the family Cannaceae. 



58. Xarithomonas cannae. 



C. Attack members of the family Gramineae. 



51. Xanthomonas axonopodis. 

 20. Xanthomonas holcicola. 



52. Xanthomonas oryzae. 



53. Xanthomonas panici. 



5. Xanthomonas rubrilineans . 

 57. Xanthomonas rubrisubalbicans . 

 33. Xanthomonas translucens. 

 35. Xanthomonas vasculorum,. 



D. Attacks members of the family Iridaceae. 



49. Xanthomonas gummisudans. 



E. Attack members of the family Liliaceae. 



1. Xanthomonas hyacinthi. 

 44. Xanthomonas phormicola. 



F. Attacks members of the family Musaceae. 



52. Xanthomonas celebensis. 



G. Attacks members of the family Zingiberaceae. 



60. Xanthomonas zingiberi. 



II. Cause of leaf, stem and fruit spots and occasional blights of dicotyledonous plants. 

 A. Attacks members of the family Aceraceae. 



41. Xanthomonas acernea. 



