Crud...

treevet · Apr 30, 2016

I have a juvenile Cherry planting that was doing great...til Black knot enveloped it this spring. As far as I know there is no treatment for this that eradicates. Anyone delve into this lately with success or is any attempts a waste of time. A huge nursery I bought this from told me last year they were having an awful time with it. This year they are playing it down and have stock but I bought this from them 2 or 3 years ago and, damn I am real disappointed.

mrtree · Apr 30, 2016

The only thing that I know works is Captan. Dithane, dacinol, polyram etc. does not have any effect.

Captan is the name of a general use pesticide (GUP) that belongs to the phthalimide class of fungicides.

mrtree · Apr 30, 2016

Now that I read your other post why don't you ask the experts somewhere else.

treevet · Apr 30, 2016

They axed the University Ag. Extension service here. That is what this part of the forum is for son. Maybe find someone that has run this trail already

guymayor · May 3, 2016

Take out your frustrations with a hand pruner and clip them out. On big branches, excise them (trace the wounds).

Best to catch it early; prune every 2 weeks--not every 2 years!

treevet · May 3, 2016

Have you had recovery Guy?

guymayor · May 3, 2016

Yes this is black knot country, and sanitation is a solution when it is practiced in a timely fashion. This is the most basic tree care practice, isn't it?

If it's neglected, then recovery is more difficult or even impossible when it gets systemic.

treevet · May 5, 2016

I guess you are going right inside (non distal side) otherwise completely healthy branches to excise the canker at times?

guymayor · May 6, 2016

non-distal = proximal...done on semihealthy branches too.

Shigo: "Arborists should carry a chisel with rounded corners at all times." But you knew that...