| I have the same problem with my tropical nectarine tree some kind of gel I put it down to, too much moisture as we have had a decent amount of rain this summer, and it you are not living in the top half of Oz maybe you are watering it too much.. If the Gel/sap is down near the base check for borers.. Or it could be some kind of canker.. Have a read of the link below it may help.. |
Here is a link that might be useful: Fruit Trees oozing sap.