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Help save my Avocado tree

    3 responses

SueM starts with ...
Hi,

Can I please get some help to identify the problem with this Avocado tree?

The tree overall is quite withered, it has lost a lot of leaves. The branches seem to develop something like a fungus underneath the skin and eventually become black, withered, and dry out.

It's in a well drained position, on a slope. There's plenty of moisture in the ground. We even had a lot of storms during the last week and the leaves still look like they are partially dried out.

Another Avocado tree developed this problem a few years ago eventually died out. All the leaves fell off and just left stalks in the end.
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SueM
Brisbane
12th December 2016 10:02am
#UserID: 15161
Posts: 3
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Helena says...
You could try Phosacid systemic fungicide. I beieve phosphorous antyfungal spray might he the tree fight fungal infections. I use as preventavive, spray the trunk and leaves.
Best of luck!
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Helena
Birkdale
26th December 2016 5:47pm
#UserID: 6586
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Markmelb says...
I agree - there is a root rot issue as well as sun damage due to open canopy. Bit late to white wash branches with dilute ceiling paint but could still do. get some Antirot and do a soil drench as well as spray.
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Markmelb
MOUNT WAVERLEY,3149,VIC
27th December 2016 10:50pm
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SueM says...
Thanks for the suggestions guys. I contacted Yates and they said it's some kind of canker. They told us to remove the diseased branches and paint the cuts with liquid copper fungicide.

A systemic fungicide does seem like a more effective option but I ended up removing most branches before I saw your reply.

Can you explain what you mean by a soil drench?

I took some photos of the diseased branches. They have a sort of rusty discolouration in the core.

I also came across this website about root rot and the tress in their photos look similar. http://ucanr.edu/blogs/topics/index.cfm?start=12&tagname=root%20rot

I will also apply the phosophorous product to the remaining leaves and see what happens.

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SueM
,,NT
29th December 2016 5:58pm
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Original Post was last edited: 29th December 2016 6:07pm

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