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#1
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Do we have oak wilt?
Pretty much widespread throughout Georgetown, Live Oak trees appear to be
browning - first one limb and then others until the whole tree looks to be dead. I have never seen anything like this before. Is this problem a result of all the worms we had this spring, and will it kill the trees or will they coe back? Bob |
#2
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Do we have oak wilt?
"Bob" wrote in message
link.net... Pretty much widespread throughout Georgetown, Live Oak trees appear to be browning - first one limb and then others until the whole tree looks to be dead. I have never seen anything like this before. Is this problem a result of all the worms we had this spring, and will it kill the trees or will they coe back? The disease is spread by beetles and root grafts, not worms. If a tree is infected, it will die in almost all cases. If you have a tree that has it, you need to remove the tree as quickly as possible to prevent infection of nearby trees. It is possible to inoculate trees near infected trees with some level of success. If this is not done, trees that share root areas will eventually become infected also. All oaks in the red oak family (which Live Oaks reside) are susceptible. If you do have to remove an infected tree, I suggest planting an elm in its place. Because of this problem, I have planted only one Live Oak at my new residence. For most shade trees, I have gone with elm trees and Chinese Pistache. Cedar Elm is a Texas native and grows very well. Lacebark Elm is an Asian variety and does very well here also. Elms are susceptible to dutch elm disease (which is similar in nature to oak wilt), however dutch elm disease is not a problem in most areas of Texas and the two varieties I mentioned have a good resistance to the disease. |
#3
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Do we have oak wilt?
"RoyDMercer" wrote in message ... "Bob" wrote in message link.net... Pretty much widespread throughout Georgetown, Live Oak trees appear to be browning - first one limb and then others until the whole tree looks to be dead. I have never seen anything like this before. Is this problem a result of all the worms we had this spring, and will it kill the trees or will they coe back? The disease is spread by beetles and root grafts, not worms. If a tree is infected, it will die in almost all cases. If you have a tree that has it, you need to remove the tree as quickly as possible to prevent infection of nearby trees. It is possible to inoculate trees near infected trees with some level of success. If this is not done, trees that share root areas will eventually become infected also. All oaks in the red oak family (which Live Oaks reside) are susceptible. If you do have to remove an infected tree, I suggest planting an elm in its place. Because of this problem, I have planted only one Live Oak at my new residence. For most shade trees, I have gone with elm trees and Chinese Pistache. Cedar Elm is a Texas native and grows very well. Lacebark Elm is an Asian variety and does very well here also. Elms are susceptible to dutch elm disease (which is similar in nature to oak wilt), however dutch elm disease is not a problem in most areas of Texas and the two varieties I mentioned have a good resistance to the disease. Thanks for the answer, but I was asking if this was oak wilt or a result of the worm infestation. I know the worms don't spread it. Glad you planted different trees. My huge oaks are natural and part of the reason we chose this lot. |
#4
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Do we have oak wilt?
"Bob" wrote in message
ink.net... "RoyDMercer" wrote in message ... "Bob" wrote in message link.net... Pretty much widespread throughout Georgetown, Live Oak trees appear to be browning - first one limb and then others until the whole tree looks to be dead. I have never seen anything like this before. Is this problem a result of all the worms we had this spring, and will it kill the trees or will they coe back? The disease is spread by beetles and root grafts, not worms. If a tree is infected, it will die in almost all cases. If you have a tree that has it, you need to remove the tree as quickly as possible to prevent infection of nearby trees. It is possible to inoculate trees near infected trees with some level of success. If this is not done, trees that share root areas will eventually become infected also. All oaks in the red oak family (which Live Oaks reside) are susceptible. If you do have to remove an infected tree, I suggest planting an elm in its place. Because of this problem, I have planted only one Live Oak at my new residence. For most shade trees, I have gone with elm trees and Chinese Pistache. Cedar Elm is a Texas native and grows very well. Lacebark Elm is an Asian variety and does very well here also. Elms are susceptible to dutch elm disease (which is similar in nature to oak wilt), however dutch elm disease is not a problem in most areas of Texas and the two varieties I mentioned have a good resistance to the disease. Thanks for the answer, but I was asking if this was oak wilt or a result of the worm infestation. I know the worms don't spread it. Glad you planted different trees. My huge oaks are natural and part of the reason we chose this lot. It could be oak wilt, but your description isn't much to base a diagnosis on. I doubt it's the worms, though. We also bought because of the large oaks and have had several die. Prior to buying, we had an arborist (formerly posting here as Treedoc) come out to check the trees to give an opinion on whether there was oak wilt. He gave a vague answer, and basically said trees don't live forever, plant some other trees in case these croak. I watched for all the 'classic' signs - patterns on leaves etc, but never saw them as trees died. One symptom that I have seen consistently is peeling bark, which Brown looked right at and declared not oak wilt. Drop the money on Alamo. If you catch it early, you can save the tree for several years. If you get there first, the tree will be safe for several years, but probably needs 'booster shots' down the road. If the tree already has dead branches, don't waste your money. However, the best advice is: trees don't live forever, plant some other trees in case these croak. |
#5
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Do we have oak wilt?
"grubber" wrote in message
... It could be oak wilt, but your description isn't much to base a diagnosis on. I doubt it's the worms, though. We also bought because of the large oaks and have had several die. Prior to buying, we had an arborist (formerly posting here as Treedoc) come out to check the trees to give an opinion on whether there was oak wilt. He gave a vague answer, and basically said trees don't live forever, plant some other trees in case these croak. I watched for all the 'classic' signs - patterns on leaves etc, but never saw them as trees died. One symptom that I have seen consistently is peeling bark, which Brown looked right at and declared not oak wilt. Drop the money on Alamo. If you catch it early, you can save the tree for several years. If you get there first, the tree will be safe for several years, but probably needs 'booster shots' down the road. If the tree already has dead branches, don't waste your money. However, the best advice is: trees don't live forever, plant some other trees in case these croak. It doesn't sound like he's much of an arborist if that's all he did and that's all the advice he had to give. There are tests which can be run to tell if you have oak wilt. If you do have it, it is important to catch the problem early on to save the tree if possible or at the least remove it so adjacent trees will not be infected. It sounds like he didn't even give you advice as to which trees to replant with. I would not pay someone to tell me things I already know. He should have given you a difinitive answer. If he can't, I would find someone else who can. |
#6
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Do we have oak wilt?
On Tue, 27 Apr 2004 10:31:34 GMT, "Bob"
wrote: Pretty much widespread throughout Georgetown, Live Oak trees appear to be browning - first one limb and then others until the whole tree looks to be dead. I have never seen anything like this before. Is this problem a result of all the worms we had this spring, and will it kill the trees or will they coe back? Bob As someone said, you really haven't given much to go on. It is entirely possible that the browning you see is the catkins (flowers) that are finishing their cycle and falling off the trees. When live oaks are in this period of dropping/adding leaves and also flowering at the same time, they sometimes look dead when they aren't. Add the leaf-rollers, which are quite heavy this year, and it may seem you have no live leaves when if fact they are just being eaten as fast as they come out. try this link to get up to speed on the disease: http://plantpathology.tamu.edu/Texlab/oakwilt.html A somewhat conclusive test is possible that would help to diagnose for wilt, but it is not 100% reliable. In live oaks, the disease is not as quick to kill a tree and you may do well to wait a couple of more weeks to see if new leaves are growing and if they are symptomatic. If these are particularly nice trees, you may consider time is of the essence, and an immediate consultaion from a consulting arborist could assuage your fears. As my sig suggests, I am a professional arborist, but if you want an impartial consultation I suggest you call Don Gardner (263-2586), who will give you good info and advice but will not try to sell you the work he recommends. Of course, I am happy to offer a consultation and to help you if your trees have a problem. Feel free to cal or email. Sincerely, Keith Babberney ISA Certified Arborist #TX-0236 512-924-1245 arborworks at austintx dot com For more info about the International Society of Arboriculture, please visit http://www.isa-arbor.com/home.asp. For consumer info about tree care, visit http://www.treesaregood.com/ |
#7
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Do we have oak wilt?
Thanks to all for the good advice
"Babberney" wrote in message ... On Tue, 27 Apr 2004 10:31:34 GMT, "Bob" wrote: Pretty much widespread throughout Georgetown, Live Oak trees appear to be browning - first one limb and then others until the whole tree looks to be dead. I have never seen anything like this before. Is this problem a result of all the worms we had this spring, and will it kill the trees or will they coe back? Bob As someone said, you really haven't given much to go on. It is entirely possible that the browning you see is the catkins (flowers) that are finishing their cycle and falling off the trees. When live oaks are in this period of dropping/adding leaves and also flowering at the same time, they sometimes look dead when they aren't. Add the leaf-rollers, which are quite heavy this year, and it may seem you have no live leaves when if fact they are just being eaten as fast as they come out. try this link to get up to speed on the disease: http://plantpathology.tamu.edu/Texlab/oakwilt.html A somewhat conclusive test is possible that would help to diagnose for wilt, but it is not 100% reliable. In live oaks, the disease is not as quick to kill a tree and you may do well to wait a couple of more weeks to see if new leaves are growing and if they are symptomatic. If these are particularly nice trees, you may consider time is of the essence, and an immediate consultaion from a consulting arborist could assuage your fears. As my sig suggests, I am a professional arborist, but if you want an impartial consultation I suggest you call Don Gardner (263-2586), who will give you good info and advice but will not try to sell you the work he recommends. Of course, I am happy to offer a consultation and to help you if your trees have a problem. Feel free to cal or email. Sincerely, Keith Babberney ISA Certified Arborist #TX-0236 512-924-1245 arborworks at austintx dot com For more info about the International Society of Arboriculture, please visit http://www.isa-arbor.com/home.asp. For consumer info about tree care, visit http://www.treesaregood.com/ |
#8
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Do we have oak wilt?
"Babberney" wrote
If these are particularly nice trees, you may consider time is of the essence, and an immediate consultaion from a consulting arborist could Your County Extension Agent can help, too, and they don't charge as much. Not nearly the expertise of a professional arborist, but still a lot more than most. |
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