Push the gumming aside and expose and kill the caterpillar borers.
Fruit
Gumming from greater peachtree borer is copious in spring.
Clear ooze and healthy tissue under the ooze indicates an environmental cause.
The gummosis on this tree is due to a frost crack wound.
Clear gumming on a sweet cherry of unknown environmental cause.
Clear ooze and healthy tissue under the ooze indicates an environmental cause.
Gumming from cytospora canker will be lighter at first, and age darker.
Hardened, dark amber gum from cytospora canker, with newer gumming at top left.
Cytospora canker needs a wound to cause infection, often entering at pruning stubs.
Cytospora canker infections are often seen in branch crotches.
Cytospora canker causes the inner tissue to be a solid brown (necrotic).
Gumming from borers will exude in tendrils.
Gumming from borers will exude in tendrils.
Gumming from borers will exude in tendrils.
Gumming from borers will exude in tendrils.