There are variety of disease issues that could contribute to branch loss of this type. Localized infection in the branches could be an issue. In addition, more systemic stresses like root rots (including Armillaria root disease), Verticillium wilt, girdling roots, etc. could lead to branch dieback as well. I can't say too much more without seeing additional photos of the tree (I'd like to see what the trunk at the soil line looks like) and physical samples.
Brian (:))
| Case | Submitted | Team | Category | Responses |
|---|---|---|---|---|
| Bouquet Ear - Corn Syndrome | 11/11/2009 | Grains | Corn Agronomy | 1 |
| Struggling Maple | 11/10/2009 | Woody plants | 1 | |
| Woodland plant id | 10/19/2009 | No Specialization | 1 | |
| arbor vitae disease | 10/12/2009 | No Specialization | 1 | |
| Brown Spots in Apples | 10/6/2009 | Horticulture | Fruit and Orchard | 1 |
| Fungi/Mushroom ID | 10/1/2009 | No Specialization | 1 | |
| corn foliar issues | 9/23/2009 | Grains | Soil Fertility | 1 |
| Plant/weed ID | 9/22/2009 | No Specialization | 1 | |
| Wacky Mushroom ID | 9/21/2009 | No Specialization | 1 | |
| Curling leaves on apple tree | 9/17/2009 | Horticulture | Fruit and Orchard | 2 |
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