CARTER: THE WETWOOD DISEASE OF ELM 7 



base of a cut (Fig. 9) and around trunk cracks (Fig. 10). Young 

 shoots directly above the fluxing regions may wilt. Tree foliage, 

 young shoots, and grass beneath a fluxing area may be killed if 

 the flux drops on them. Growth of air-borne bacteria, yeasts, and 

 other fungi in the fluxing sap may produce gray to brown, foam- 

 like, ill-smelling, slimy masses around wounds. This slimy mate- 

 rial is commonly called slime flux (Fig. 11). 



Fig. 6. — Fluxing occurs through Kig. 7. — Flux that escapes through 



trunk cracks that penetrate to the holes in the trunk will flow down 



wetwood-afTected tissues, as in the over the bark. The hole shown ai)ove 



frost crack shown in this picture. was made by an increment borer. 



