102 



MANUAL OF TREE DISEASES 



Leaf-Spot 



Caused by Cercospora tilim Peck 



The leaves of the basswood are often affected by this disease. 

 Large brown dead areas are formed at the tip or along the mar- 

 gin of the leaf (Fig. 10). A broad yellowish border surromids 



Fig. 10. — Leaf-spot of basswood. 



the spot. The fruiting bodies of the causal pathogene are in- 

 conspicuous. For the general life history and colitrol of leaf- 

 spot fungi, see page 33. 



