Help - black mold on leaf veins

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daxathon
Posts: 4
Joined: Sat Jul 21, 2007 6:32 pm

Help - black mold on leaf veins

Post by daxathon »

I have a 1 yr old jonagold de coster tree. It has a black looking mold on a lot of the leaves. The mold seems to concentrate near the leaf veins. Does anyone know what this might be and what I should do? Any help is greatly appreciated. I have other apple trees near this tree that don't have this problem.

I kind of assumed that since the tree was young and I would not be getting fruit that I did not have to spray the trees.

daxathon
Posts: 4
Joined: Sat Jul 21, 2007 6:32 pm

Re:Help - black mold on leaf veins - Added some pictures

Post by daxathon »

Here are some pictures:

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apgrower
Posts: 5
Joined: Fri Oct 31, 2008 7:14 pm
Location: kane pa
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Post by apgrower »

that is apple s cab on your leaves

tkuntz
Posts: 98
Joined: Sun Feb 24, 2008 8:01 pm
Location: Elizabethtown, PA
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Post by tkuntz »

Apple scab is probably the number one fungus challenge in apple tree production. Some varieties are more suseptable than others. Any tree with Jonathan or McIntosh in its genetics is very suseptable to scab.

The round lesions are the apple scab infections from this past spring. The black "mold" is the most recent release of scab spores this fall.

Rake the fallen leaves from under your trees and remove them from the area.

Prune the trees to open up the canopy to allow air to move through the tree. Keeping the foliage dry helps reduce the spread.

You can find many other scab control tips on the web.

hartsorchards
Posts: 19
Joined: Mon Oct 13, 2008 7:30 am

Post by hartsorchards »

You've also got some cedar rust spores!

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