Apple Scab on my Flowering Crab Tree?

Last year our flowering crab tree looked beautiful, as usual, when the flowers opened in mid May. The leaves came on afterwards as always, but in late June the leaves turned yellow and brown and by mid July they had…

Cherry Tree -Black Knot

My cherry tree has a big knob on one of the branches I was wondering what it is. It is in full sun. We have clay soil. I think we are in zone 5 here in Schomberg ON…