I hate to see that. I lost an apple and peach tree last years due to it being girdled by disease. Take a knife and cut the damaged bark back to see if it has borer holes in it. If not it could be Cytospora canker. This is what got my trees. The one thing I do not see that a peach has with this disease is oozing amber jelly like goo. It may be to early though for it to start as it does it during the growth period. It will also ooze in areas on other parts of the tree as well. Oh and be sure to clean the knife with bleach or rubbing alcohol after using it on the tree to prevent spreading it. Unfortunately by the amount of damage it looks like it will be hard to save the tree.

It appears to be a combo of insect and perhaps a root problem. Much of the damage has dry edges, so I'd think the damage is old. The insects that notch the edges of leaves are root weevils. Look for them at night. Some leaves near the top may have been damaged by birds. (Difficult to determine for certain.)

What grow zone are you in? What kind of fertilizer and how are you applying it? How often do you water/fertilize? The plant is in a small pot, what are your plans, to leave it in a pot or to plant in the ground?

Brown Blades Down Low. AKA BBDL. :-) So far, it seems the grass is healthy, but the grass is developing browner blades in the lower sections. This is not a disease. It's not a problem. It's totally natural as the grass grows in. Mine has it too, every late spring. While this could be the sign of a very early fungal infection, I don't see any other signs of it at this moment. It's much simpler than that. The grass looks too young to stand up fully just yet, but don't mow shorter. Longer mows will encourage slightly thinner grass right now, but longer roots on it. I'd accept the trade-off. " planted grass this Spring " Make sure to keep an eye on it, just like you're doing, as it's likely to need some extra care and watering this summer as things heat up. So far, you're doing really well but the harder periods are still coming...