Question
Hi David,

I just came across this site when I googled "plant diseases". I live in central PA.

1) The viburnum has done well over the past 5 years however just this past week the leaves are yellowing all over the plant and some look burnt in spots - new leaves at bottom are thriving and well. Also,no bugs that I can see and it's never given me problems before. It's acturally been a very easy plant.

2) The flowering peach tree I planted 2 years ago and it was about a 1.5" caliber at the time. Last year it developed a fungus like growth (dark-pale pink color) on several leaves but I caught it very late. This year it's starting again and I followed a local nursery instructions which said for me to pull off any leaves attacked by fungus (spurs) and dispose so the spurs don't blow over onto other branches. I did this tonight but I'm wondering if there is any more I need to watch for. Of course beetles were a problem for this tree but I used a bettle killer for fruit trees and that seemed to solve the problem so I will do the same this year when necessary (not planning on eating fruit anyway).

I have pics I can send of both leaf problems. Would that help or is the above info enough for you to diagnose? Thanks so much!

Answer
Pictures are always helpful for plant diagnosis.  You can sned them if you want.  The viburnum sounds like a too much water.  They are evergreen and should not have yellow leaves.  There could be a fungus leaf spot, but I think it is probably environmental.

The peach probably has peach leaf curl, a fungal disease that turns leaves purple and causes them to be distorted.  You will have to treat with a fungicide to prevent this.  Maneb is a good product for fruit trees.  

I await your pictures.  Thanks.