70 



RATIONAL FRUIT CULTURE, 



Branches or Stem Affected: — 



Wounds, ridged round by rough bark (Canker). 

 Exudation of gum (Gummosis). 

 Small cracks in bark of young trees (Stem disease). 

 Clusters of brownish toadstools near the ground 



(Tree-root rot). 

 Red globules on bark (Coral-spot disease). 



FUNGOID DISEASES IN ALPHABETICAL ORDER. 



The fungoid diseases which follow are only a few of those 

 that attack fruit trees, but they are the commonest, and the 

 most troublesome. The popular names are used because they 



Fig. 23 — Poar Scab. 



are more easily rcineinlnMed (han tlu- hotanii-'al names of the 

 fungi. 



Apple and Pear Scab.— Apple imd l'<>nr: dilTorent species 

 of fungi, but very much alike. Black blotches (green, when 

 the s[ioreH ripen t appear on the leaves, then on the shoots, 



