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Citrus Disease

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Cooya FNQ starts with ...
I have a Meyer lemon that has peeling bark. Where I have scraped the bark off there seems to be new growth of a buff colour underneath. Seems to have started near what I think might be the graft point & spread to one branch in particular. Tree is around 10-12 years old. There is also a gummy sap present in parts. Tree has just finished a good crop and is flowering and fruit setting at present. Leaves have slight yellow section discoloration in places, but generally nothing too noticeable
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CooyaFNQ
Mossman
17th August 2017 8:34am
#UserID: 16698
Posts: 3
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Clivey says...
It looks to me like an insect / microbe attack. I personally, after removing the crop, would use a systemic spray ( very rare for me) to prevent a total die off.The bugs / mould / whatever is attacking the cambium level for sap.I fear you may loose the whole tree.It is not very old.
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Clivey
Tabulam
21st August 2017 9:21am
#UserID: 16721
Posts: 5
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CooyaFNQ says...
Thankyou Clivey
I have have sprayed with LIME SULPHUR for insects & disease as per advice from an orchid owner in the district and will follow up with a solution of Magnesium Permanganate. Fingers crossed.
What would you use?
Willing to try anything
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CooyaFNQ
Cooya Beach
9th September 2017 9:35am
#UserID: 16698
Posts: 3
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Clivey says...
If I suspected a collar rot, I would remove loose bark and destroy, then spray with Those sprays advised, or copper oxychloride. If the leaves show yellowing I would suspect moisture and poor ventilation , however I would still be inclined to a systemic foliage spray like Rogor, but THAT has been known to damage Meyer lemons. Otherwise Lebaycid may treat sap suckers better.If the foliage looks good I would try the antifungals on the trunk first, after removal of loose bark.
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Clivey
TABULAM,2469,NSW
12th September 2017 8:47am
#UserID: 16721
Posts: 5
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CooyaFNQ says...
Thanks for the advice, much appreciated. Will give it a go.
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CooyaFNQ
Cooya Beach
13th September 2017 5:13pm
#UserID: 16698
Posts: 3
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Clivey says...
Just picked up a book by the late Allan Seale, (Vinnies $1) he recommends a strong copper paste be painted on the trunk after removal of diseased bark.Problem is due to moisture .The plant is out of it,s normal environment due to high moisture levels in FNQ, possibly also rain splash. He recommends a stone scree under the canopy to reduce moisture level....I have found that with 4 of my citrus the stone groundbase beneath reflects the heat and helps keep those trees dry,as they are in a wetter situation than the other 7 I have.Best of luck.
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Clivey
TABULAM,2469,NSW
16th September 2017 2:22pm
#UserID: 16721
Posts: 5
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