My peach tree looked so healthy and all of a sudden we’ve got some parasite/growth. I’m really not sure what it is so am calling it various things at the moment. Couldnplease review the attached photos and tell me what we can do to relieve the tree of growth. Thank you!
This looks like Black Knot, which is a fungal disease which is a common problem on Stone Fruits in our area. Infected shoots and limbs should be cut out 6 to 8 inches below the symptoms and destroyed annually when the trees are pruned and before the knots become very large.
Here is our page on Stone Fruits, which includes peaches: http://extension.umd.edu/hgic/planting-and-care-peaches-cherries-plums-apricots-nectarines
To grow what most consider good tree fruits in Maryland, a careful management program which includes well-timed and repeated spray applications of chemicals to control diseases and pests is needed.
Here is more information about that: http://extension.umd.edu/hgic/plants/tree-fruits-pest-control-and-spray-schedules