rfwoodvt
New member
- Location
- This side of eternity.
Hey All!
We have a customer with a mature Quercus rubra. Co dominant at the stump, both leaders independent and able to thrive on their own.
Primary leader is on the north, secondary on the south. Tree is nestled on the edge of a ravine wtih full sunlight to the upper and southern canopies.
Symptoms: Severe Leaf blight and twig & limb necrosis on the lower 3/5th on the north side of the northern leader. Upper 1/5 is thriving while there is what looks like anthracnose on the next lower 1/5th.
Southern leader has some symptoms but sporadic, and not nearly as severe.
Please keep in mind that the defoliated/necrotic limbs are in the "sun lee" of the tree. We have only done a ground survey and naked eye observations to this point. We have not been able to examine the twigs yet.
The few dropped leaves we have looked at do have several things going on, including what looks like anthracnose lesions.
Weather has not been abnormally wet or dry this summer, tho we had a dryer than normal spring. Dry enough to thwart apple scab this year.
When you first look at the tree you have to say, " Oh! its just anthracnose" But the you see the severity and extent of the necrosis you have to say Necrosis on Steroids but when you start analyzing it further, this is more necrosis than any of the anthracnose sites says is likely.
So here are my Questions:
<ul type="square">
[*]Will anthracnose kill a huge, otherwise healthy appearing tree?
[*]Can Anthracnose "march" that far up the tree (50 feet)
[*]Can Branch dieback be caused by successive years of anthracnose defoliation
[*] can anthracnose "stop" at the same place each year due to better light, air circulation or drying?
[*] can the stress induced on the limbs by the anthracnose kill the whole limb? (we're talking up to 10" diameter limbs here)
[*] does this even sound like anthracnose?
[/list]
We have a customer with a mature Quercus rubra. Co dominant at the stump, both leaders independent and able to thrive on their own.
Primary leader is on the north, secondary on the south. Tree is nestled on the edge of a ravine wtih full sunlight to the upper and southern canopies.
Symptoms: Severe Leaf blight and twig & limb necrosis on the lower 3/5th on the north side of the northern leader. Upper 1/5 is thriving while there is what looks like anthracnose on the next lower 1/5th.
Southern leader has some symptoms but sporadic, and not nearly as severe.
Please keep in mind that the defoliated/necrotic limbs are in the "sun lee" of the tree. We have only done a ground survey and naked eye observations to this point. We have not been able to examine the twigs yet.
The few dropped leaves we have looked at do have several things going on, including what looks like anthracnose lesions.
Weather has not been abnormally wet or dry this summer, tho we had a dryer than normal spring. Dry enough to thwart apple scab this year.
When you first look at the tree you have to say, " Oh! its just anthracnose" But the you see the severity and extent of the necrosis you have to say Necrosis on Steroids but when you start analyzing it further, this is more necrosis than any of the anthracnose sites says is likely.
So here are my Questions:
<ul type="square">
[*]Will anthracnose kill a huge, otherwise healthy appearing tree?
[*]Can Anthracnose "march" that far up the tree (50 feet)
[*]Can Branch dieback be caused by successive years of anthracnose defoliation
[*] can anthracnose "stop" at the same place each year due to better light, air circulation or drying?
[*] can the stress induced on the limbs by the anthracnose kill the whole limb? (we're talking up to 10" diameter limbs here)
[*] does this even sound like anthracnose?
[/list]
