Question
My son bought me a 2 year old patio peach tree for mother抯 day this year and was growing fine and looking healthy until this week. The leaves started to look like the plant was dry but it wasn抰 and tonight i抳e come home from work and there are hardly any leaves left on it. On closer inspection there are three blobs of what i can only describe as looking like clear glue on the trunk. Sort of hard to touch but upon pressing become softer. Have you any idea what it is and is there any way of treating it before it dies?

Answer
There are several different things that can make a peach tree have sap on the trunk.  When these trees are injured or unhappy, they will bleed some sap.  You will need to rule out possible causes for the problem and most likely will just have to watch and hope.

It may simply be the result of moving the tree to a new site.  The sap may have been present for a while, but this could explain the leaf drop.  If you have it planted in the ground, it may be that something with the site isn't quite right for the tree.  Possible problems include improper pH (too high/too low), too wet or dry, inadequate light, etc.  The tree could also have been injured in the winter and the sap is leaking out of freeze cracks.  

Another cause of sap on the trunks of peach trees is peachtree borers.  If it is borers, they are usually close to the ground and you will see wood/sawdust mixed in with the sap.  Below are links to two factsheets that show pictures of the insect and give information about control.  Borers would be good news because there are treatment methods.  These are factsheets from the US, so you may need to look for some specific to your area if you need to treat with chemicals.
http://extension.usu.edu/files/publications/factsheet/greater-peachtree-borers07...
http://ag.udel.edu/extension/horticulture/pdf/ent/ent-14.pdf

If you have ruled out environmental stresses and borers, the problem may be due to a canker pathogen.  There are three main pathogens that cause gumming on Prunus.  They are bacterial canker (Pseudomonas syringae), Botryosphaeria canker, and Cytospora canker.  Unfortunately, since the symptoms are on the main trunk you cannot prune this disease out at this point.  

At this point, your best advice is to promote health and vigor by watering during periods of drought and maintaining proper fertility.  If the problem is the result of environmental conditions, the tree will recover but it may take some time.  Be patient because I think this is the most likely cause of your problem.

Good luck!