CARTER: THE WETWOOD DISEASE OF ELM 



11 



Fig. 11. — Slime flux is an external manifestation of wetwood. It is pro- 

 duced by air-borne bacteria, yeasts, and other fungi that grow in the sap 

 that exudes through wounds. 



Fig. 12. — Spread of the wetwood sap into branches may cause browning 

 of tissues between the veins and along the margins of leaves. 



