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#1
24-03-2004, 03:42 AM
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Sick Ash tree
I have a fully grown, 25 year old ash tree. A few years ago some crunchy,
crab-apple type growths appeared on some of the branches. I must say I didn't pay much attention, but last year a significant amount of the tree was covered. When removed, these growths crumble into small pieces. They are dark brown in colour. The tree seems healthy otherwise. I'm in Canada, Southern Ontario. I'd appreciate some advice on what is happening., and what I can do about it. Thanks, George |
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#2
24-03-2004, 06:07 AM
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Sick Ash tree
I have a fully grown, 25 year old ash tree. A few years ago some crunchy,
crab-apple type growths appeared on some of the branches. Sounds like dried eriophyid mite galls. These microscopic mites commonly cause deformed galls on ash trees that are originally green but dry to a crumbly dark brown. Although unsightly, they rarely affect the health of the tree. For more information see: http://www.colostate.edu/Depts/CoopE...sts/emite1.htm and http://www.colostate.edu/Depts/CoopE...ests/galls.htm sed5555 |
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#3
24-03-2004, 11:32 AM
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Sick Ash tree
George said:
I have a fully grown, 25 year old ash tree. A few years ago some crunchy, crab-apple type growths appeared on some of the branches. I must say I didn't pay much attention, but last year a significant amount of the tree was covered. When removed, these growths crumble into small pieces. They are dark brown in colour. The tree seems healthy otherwise. I'm in Canada, Southern Ontario. I'd appreciate some advice on what is happening., and what I can do about it. How far are you from the Emerald ash borer area (extreme SW Ont. in Canada)? If your tree is in or near the area of infestation it's likely doomed. Keep an eye on it to check for the possibility that you have an outlier infestation even if you aren't in the effected zone. (I noticed these growths on some ash trees in our neighborhood before the borers did them; they might have been a sign that the trees were weakening.) Info and link to a map of affected area in Ontario he http://www.inspection.gc.ca/english/.../agrplae.shtml Michigan sites on EAB: http://www.msue.msu.edu/reg_se/roberts/ash/ http://www.michigan.gov/mda/0,1607,7...298---,00.html -- Pat in Plymouth MI ('someplace.net' is comcast) Any technology distinguishable from magic is insufficiently advanced. (attributed to Don Marti) |
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#4
24-03-2004, 12:07 PM
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Sick Ash tree
George said:
I have a fully grown, 25 year old ash tree. A few years ago some crunchy, crab-apple type growths appeared on some of the branches. I must say I didn't pay much attention, but last year a significant amount of the tree was covered. When removed, these growths crumble into small pieces. They are dark brown in colour. The tree seems healthy otherwise. I'm in Canada, Southern Ontario. I'd appreciate some advice on what is happening., and what I can do about it. How far are you from the Emerald ash borer area (extreme SW Ont. in Canada)? If your tree is in or near the area of infestation it's likely doomed. Keep an eye on it to check for the possibility that you have an outlier infestation even if you aren't in the effected zone. (I noticed these growths on some ash trees in our neighborhood before the borers did them; they might have been a sign that the trees were weakening.) Info and link to a map of affected area in Ontario he http://www.inspection.gc.ca/english/.../agrplae.shtml Michigan sites on EAB: http://www.msue.msu.edu/reg_se/roberts/ash/ http://www.michigan.gov/mda/0,1607,7...298---,00.html -- Pat in Plymouth MI ('someplace.net' is comcast) Any technology distinguishable from magic is insufficiently advanced. (attributed to Don Marti) |
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#5
24-03-2004, 12:12 PM
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Sick Ash tree
George said:
I have a fully grown, 25 year old ash tree. A few years ago some crunchy, crab-apple type growths appeared on some of the branches. I must say I didn't pay much attention, but last year a significant amount of the tree was covered. When removed, these growths crumble into small pieces. They are dark brown in colour. The tree seems healthy otherwise. I'm in Canada, Southern Ontario. I'd appreciate some advice on what is happening., and what I can do about it. How far are you from the Emerald ash borer area (extreme SW Ont. in Canada)? If your tree is in or near the area of infestation it's likely doomed. Keep an eye on it to check for the possibility that you have an outlier infestation even if you aren't in the effected zone. (I noticed these growths on some ash trees in our neighborhood before the borers did them; they might have been a sign that the trees were weakening.) Info and link to a map of affected area in Ontario he http://www.inspection.gc.ca/english/.../agrplae.shtml Michigan sites on EAB: http://www.msue.msu.edu/reg_se/roberts/ash/ http://www.michigan.gov/mda/0,1607,7...298---,00.html -- Pat in Plymouth MI ('someplace.net' is comcast) Any technology distinguishable from magic is insufficiently advanced. (attributed to Don Marti) |
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#6
24-03-2004, 03:17 PM
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Sick Ash tree
It would unusual to see eriopyiid gall formation on branches - leaves and
petioles usually. If the original post is correct, my impression would be more like cynipid gall wasps or and Agrobacterium-like infection in the woody tissue. I am admittedly weak on the local patho-flora and fauna of Canada however! Mike -- Mike LaMana, MS Heartwood Consulting Services, LLC Toms River, NJ www.HeartwoodConsulting.net "Sed5555" wrote in message ... I have a fully grown, 25 year old ash tree. A few years ago some crunchy, crab-apple type growths appeared on some of the branches. Sounds like dried eriophyid mite galls. These microscopic mites commonly cause deformed galls on ash trees that are originally green but dry to a crumbly dark brown. Although unsightly, they rarely affect the health of the tree. For more information see: http://www.colostate.edu/Depts/CoopE...sts/emite1.htm and http://www.colostate.edu/Depts/CoopE...ests/galls.htm sed5555 |
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#7
24-03-2004, 03:32 PM
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Sick Ash tree
It would unusual to see eriopyiid gall formation on branches - leaves and
petioles usually. If the original post is correct, my impression would be more like cynipid gall wasps or and Agrobacterium-like infection in the woody tissue. I am admittedly weak on the local patho-flora and fauna of Canada however! Mike -- Mike LaMana, MS Heartwood Consulting Services, LLC Toms River, NJ www.HeartwoodConsulting.net "Sed5555" wrote in message ... I have a fully grown, 25 year old ash tree. A few years ago some crunchy, crab-apple type growths appeared on some of the branches. Sounds like dried eriophyid mite galls. These microscopic mites commonly cause deformed galls on ash trees that are originally green but dry to a crumbly dark brown. Although unsightly, they rarely affect the health of the tree. For more information see: http://www.colostate.edu/Depts/CoopE...sts/emite1.htm and http://www.colostate.edu/Depts/CoopE...ests/galls.htm sed5555 |
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#8
24-03-2004, 03:42 PM
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Sick Ash tree
It would unusual to see eriopyiid gall formation on branches - leaves and
petioles usually. If the original post is correct, my impression would be more like cynipid gall wasps or and Agrobacterium-like infection in the woody tissue. I am admittedly weak on the local patho-flora and fauna of Canada however! Mike -- Mike LaMana, MS Heartwood Consulting Services, LLC Toms River, NJ www.HeartwoodConsulting.net "Sed5555" wrote in message ... I have a fully grown, 25 year old ash tree. A few years ago some crunchy, crab-apple type growths appeared on some of the branches. Sounds like dried eriophyid mite galls. These microscopic mites commonly cause deformed galls on ash trees that are originally green but dry to a crumbly dark brown. Although unsightly, they rarely affect the health of the tree. For more information see: http://www.colostate.edu/Depts/CoopE...sts/emite1.htm and http://www.colostate.edu/Depts/CoopE...ests/galls.htm sed5555 |
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