Local contacts Audrey Gustafson Gary Swanson North Sioux Lease cabins Older dead red pine are present Younger red pine are growing within the decline pocket they appear very healthy Evidence of ID: 1020116
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1. Case study on red pine decline and mortality impacting cabin leases on the Chippewa National ForestLocal contactsAudrey Gustafson Gary Swanson
2. North Sioux Lease cabins
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6. Older dead red pine are presentYounger red pine are growing within the decline pocket, they appear very healthy.
7. Evidence of armillaria root disease was found (white mycelial mats).
8. How do you look for armillaria in a tree Use a hatchet, axe, polaski, or shovel. Take the bark off at the base of a recently dead tree or a tree under significant decline.Look for white mycelial mats, resin flow, or other signs
9. White pine, balsam fir and white spruce appear unaffected.
10. Terrain varies from a low wet area to a well drained ridge. The pocket extends across bothAreas.
11. Red pine do not like wet feet!
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13. There is a distinct edge to the pocket.Full, dark green crowns on one side; sparse,off-color crowns on the other side side.
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15. Symptoms General crown decline in a pocket or groupSome tree mortality but no clear centerOlder red pine affected, white pine looks healthy as do young red pineDistinct pocket border is presentPossible culprits….
16. Possible causesHeterobasidion annosum Armillaria root diseaseRed pine pocket mortality – Leptographium and various insectsIps bark beetlesHigh water table
17. Possible causesHeterobasidion annosum Armillaria root diseaseRed pine pocket mortality – Leptographium and various insectsIps bark beetlesHigh water table
18. Possible causesHeterobasidion annosum Armillaria root diseaseRed pine pocket mortality – Leptographium and various insectsIps bark beetlesHigh water table
19. Possible causesHeterobasidion annosum Armillaria root diseaseRed pine pocket mortality – Leptographium and various insectsIps bark beetlesHigh water table
20. Possible causesHeterobasidion annosum Armillaria root diseaseRed pine pocket mortality – Leptographium and various insectsIps bark beetlesHigh water table
21. PrognosisThe declining trees will not recover. Further mortality will occur. How quickly trees die is difficult to predict.
22. PrognosisThe pocket may or may not keep expanding down the lake shore.
23. ActionsAllow the cabin owners some leeway on cutting trees – Sanitation – do not create further problemsThe challenge is stopping the expansion of the pocket - Mark the current boundary – is the pocket expanding in size?