June 1,1925 Susceptibility of Plants to Attack by Gitrus-Scab Fungus 1093 
SUMMARY 
The citrus scab fungus attacks a 
comparatively narrow range of plants 
in the family Rutaceae, as indicated by 
observations and inoculations made 
on 2 subfamilies, 2 tribes, 4 subtribes, 
22 genera, 35 species, 71 varieties, and 
47 hybrid combinations. Many citrus 
forms appear to be immune, while the 
susceptible ones exhibit all grades of 
resistance. 
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