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My lemon tree which is about 50cm high and grows indoor in a pot has started oozing sp from it's trunk. Has anyone got any ideas as to what has caused this and is there anything I can do about it? Is it part of a terminal disease?

fidgetbones

Check the underside of the leaves for scale insects. They bite holes which then ozze sap.

No obvious insects, no holes in the leaves, leaves still nice and green!

 

Symptons read as gummosis,mentions scale as fidget said.

This link shows details on it http://homeorchard.ucdavis.edu/files/140618.pdf

Point 4.

4. When should I prune a citrus tree?
In general, citrus trees do not require frequent or severe pruning. Removal of deadwood and very weak
shoots or suckers is the only pruning required. Avoid pruning grapefruit because of the potential
development of Rio Grande gummosis disease (see Q. 34). In general, no pruning is required for the first
15-20 years except for the removal of deadwood. Lemons are an exception and they require thinning and
heading back to keep control of vigorous shoot growth. Light pruning can be done any time, heavy
pruning should be done during the winter months so that tree limbs are not sunburned (DecemberJanuary). Manage the tree’s size so that it easy for you to harvest.

Do not know anythingabout lemon trees but this is what i found doing a search.

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It sounds like scale insects as already said. Is it possible it was physically damaged in some way?  Did you pull off or prune anything?

My lemon is outside now....been there since April....and I suggest you do,the same.  Keep it outside until frosts beckon.

So, it sounds like scale,so I would scrub the plant quite vigorously or scrape it with plastic plant lable, wash it with light soap and water and, when dry, spray with an insecticide.

Thank you all - I'll give it a good wash and clean this weekend and see how it does.

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