Hi everyone! I would like to ask for your help on my peach and nectarine trees’ gummosis issue.
I have one peach tree and one nectarine tree. They were planted last year. Today I noticed sap coming out of the wounded/cracked areas on their trunks. There isn’t a lot of sap. However, I am worried about their health of the trees and I am unsure what is causing it.
This picture above is the graft union. Earlier this year I noticed that the graft union had some “skin-peeling.” I’m not sure of the reason. Both tree trunks are protected by wire fencing so rabbit can’t chew on it. On this picture you can see two sites showing gummosis, one on the left one on the right. Further to the right and above you can see the peeling of the bark that dates back to this winter/spring time.
That is nothing. I have peaches with 10x as much gummosis which are still producing over 20 years later. If you get a lot it will set back the tree growth some.
I see fissures like this on multiple prunus trees as well. Since the trees I see them on are all vigorous and healthy (AFAIK), I think it’s just from normal growth. …like stretchmarks on skin. You can see the fissures are vertical as well which is how you’d expect it to be given the tension is perpendicular to the fissure.
I suppose this is as good of.place as any to ask this one. Is this also Peach Gummosis and not another issue to be taking mind of? It’s been doing this for the better part of the summer.
I saw a little bit of sap here and there until about 15 months ago we had a big hail event and now that they are dormant I can see all the wounds from the hail are still leaking quite bit of sap. They still seem to have pretty vigorous growth and produce peaches (when there isn’t a bad spring freeze). I haven’t detected any frass or insect damage.
It looked especially scary after we had some rain and the sap seemed to expand greatly. I think it was the sap puddles expanding from the moisture.
