Exudate (in plants)
Any substance that oozes out from the pores of diseased or injured plant tissue.
Resins, gums, oils and lacquers are examples of exudates widely extracted for industrial uses.
Gummy exudate along the branch of an apricot-tree
To read about this term in context:
GreenFacts Summary on Forests:
Español: Exudado (en plantas)
Français: Exsudat (de plantes)