Above: Brown edges emerging on random leaves. I am learning the behaviour of Ginkgo's, but from what I have observed, any leaf that starts dying will continue to die on its branch without dropping.
Above: This branch sustained wind damage by colliding with the fig underneath. The Compared to Figs the Ginkgo's bark is fragile. Leaves adjacent to the damage quickly died before the summer heatwave began. That leaf death spread up to the tip of the branch. The photo shows leaf death now spreading down the branch.
You cannot see the Olive in this picture. It showed some dieback earlier in the year but now appears to have fully recovered and is fruiting, so I think the Olive is not diseased.
Background: Unlike the Ginkgo, the two Acer's (out-of-focus) are in the ground. The tiny red one is doing badly but there are mitigating circumstances because it was scorched in the heatwave, and it was 50p last year after being refrigerated by a supermarket!
Ginkgo trees are very resistant to any type of disease or insects. They have lasted for centuries because of this hardiness.
I would be cautious about assuming cause and effect because surviving undisturbed in virgin enclaves does not make a species hardy. Until recently G. Biloba's native habitat in China was not exposed to the threat of industrialisation. The IUCN now classifies the last extant Ginkgophyte as "Threatened"; its hundreds or thousands of cousins were not hardy enough to make this this far.
If tree bark is damaged enough the cambium layer just below suffers and that will lead to damage to foliage and growth as it is the cambium layer that transmits sap and makes the growth ring every year. That may explain the damage to the gingko. It remains to be seen whether it is permanent or whether it can recover.
The olive tree is another matter. How long have you had it? Where did you buy it? Do you know if it was quarantined and tested before being sold? Xylella is a serious problem that needs to be contained asap. How much time and effort will it really need for you to contact the appropriate people and get a diagnosis one way or the other? You would gain peace of mind if it's not Xylella and may save a great deal of harm if it is.
As for your acers, they are woodland glade plants tho some, such as Sango Kaku, do well in full sun if the soil is moist enough and they are sheltered from strong winds. Give them plenty to drink and they may recover.
Vendée - 20kms from Atlantic coast.
"The price good men (and women) pay for indifference to public affairs is to be ruled by evil men (and women)."
The olive tree is another matter. How long have you had it? Where did you buy it? Do you know if it was quarantined and tested before being sold?
Might have bought & potted both Ginkgo & Olive circa March this year from a GC that has been around for 20 years and has a few outlets.
I know next to nothing about forestry and horticulture professions, but the GC that sold this tree advertises that the manager is RHS qualified. That might say more about the other staff than it does about the manager.
Glen - if you're savvy enough to find this forum you're savvy enough to find a contact at the Forestry commission or RHS as advised. If you watch GW you'll have seen the items about the spread of diseases thru imported plant material and the need for greater care now and in the future to protect native and long established plants and habitats and all the other flora and fauna and economic activity that depend on them.
A 20 year old GC with or without an RHS qualified manager is no guarantee unless they state it on their website and in their shop.
If you don't care, fine. If you can't be bothered, fine. If you want to risk missing a diagnosis that could help your plants to better health or safe destruction - whichever is advised - fine.
Just don't do the whole "If I'd only known" hindsight thing later on.
Vendée - 20kms from Atlantic coast.
"The price good men (and women) pay for indifference to public affairs is to be ruled by evil men (and women)."
"I would be cautious about assuming cause and effect because surviving undisturbed in virgin enclaves does not make a species hardy. Until recently G. Biloba's native habitat in China was not exposed to the threat of industrialisation.[1][2] The IUCN now classifies the last extant Ginkgophyte as "Threatened" [2][3]; its hundreds or thousands of cousins were not hardy enough to make this this far.[4]
Glen - if you're savvy enough to find this forum you're savvy enough to find a contact at the Forestry commission or RHS as advised. If you watch GW you'll have seen the items about the spread of diseases thru imported plant material and the need for greater care now and in the future to protect native and long established plants and habitats and all the other flora and fauna and economic activity that depend on them.
A 20 year old GC with or without an RHS qualified manager is no guarantee unless they state it on their website and in their shop.
If you don't care, fine. If you can't be bothered, fine. If you want to risk missing a diagnosis that could help your plants to better health or safe destruction - whichever is advised - fine.
Just don't do the whole "If I'd only known" hindsight thing later on.
Thank you for the information you provided in your first post. Please relax, I will post FC's response when I have it.
Posts
Above: Brown edges emerging on random leaves. I am learning the behaviour of Ginkgo's, but from what I have observed, any leaf that starts dying will continue to die on its branch without dropping.
Above: This branch sustained wind damage by colliding with the fig underneath. The Compared to Figs the Ginkgo's bark is fragile. Leaves adjacent to the damage quickly died before the summer heatwave began. That leaf death spread up to the tip of the branch. The photo shows leaf death now spreading down the branch.
You cannot see the Olive in this picture. It showed some dieback earlier in the year but now appears to have fully recovered and is fruiting, so I think the Olive is not diseased.
Background: Unlike the Ginkgo, the two Acer's (out-of-focus) are in the ground. The tiny red one is doing badly but there are mitigating circumstances because it was scorched in the heatwave, and it was 50p last year after being refrigerated by a supermarket!
I would be cautious about assuming cause and effect because surviving undisturbed in virgin enclaves does not make a species hardy. Until recently G. Biloba's native habitat in China was not exposed to the threat of industrialisation. The IUCN now classifies the last extant Ginkgophyte as "Threatened"; its hundreds or thousands of cousins were not hardy enough to make this this far.
The olive tree is another matter. How long have you had it? Where did you buy it? Do you know if it was quarantined and tested before being sold? Xylella is a serious problem that needs to be contained asap. How much time and effort will it really need for you to contact the appropriate people and get a diagnosis one way or the other? You would gain peace of mind if it's not Xylella and may save a great deal of harm if it is.
As for your acers, they are woodland glade plants tho some, such as Sango Kaku, do well in full sun if the soil is moist enough and they are sheltered from strong winds. Give them plenty to drink and they may recover.
I know next to nothing about forestry and horticulture professions, but the GC that sold this tree advertises that the manager is RHS qualified. That might say more about the other staff than it does about the manager.
A 20 year old GC with or without an RHS qualified manager is no guarantee unless they state it on their website and in their shop.
If you don't care, fine. If you can't be bothered, fine. If you want to risk missing a diagnosis that could help your plants to better health or safe destruction - whichever is advised - fine.
Just don't do the whole "If I'd only known" hindsight thing later on.
Citations added retrospectively.
[1] ?, "Deforestation and Desertification in China" in Facts and Details, available at: http://factsanddetails.com/china/cat10/sub66/item389.html
[2] ?, "Ginkgo Biloba L." in Key Science, available at: http://powo.science.kew.org/taxon/urn:lsid:ipni.org:names:262125-1
[3] ?, "Ginkgo Biloba" in IUCN, available at: http://www.iucnredlist.org/details/32353/0
[4] Zhi-Yan Zou, "An overview of fossil Ginkgoales" in Palaeoworld, available at: https://www.researchgate.net/publication/223266727_An_overview_of_fossil_Ginkgoales