Citrus Disease (forum)

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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Time: 17th August 2017 8:34am

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About the Author CooyaFNQ
Mossman
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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.

Time: 21st August 2017 9:21am

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About the Author Clivey
Tabulam
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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

Time: 9th September 2017 9:35am

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Cooya Beach
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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.

Time: 12th September 2017 8:47am

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About the Author Clivey
TABULAM,2469,NSW
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CooyaFNQ says...
Thanks for the advice, much appreciated. Will give it a go.

Time: 13th September 2017 5:13pm

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About the Author CooyaFNQ
Cooya Beach
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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.

Time: 16th September 2017 2:22pm

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About the Author Clivey
TABULAM,2469,NSW
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