HELP Avocado Black Spot (forum)

Amanda19 starts with ...
I purchased 12 avocado trees 2 weeks ago (8x Wurtz & 4x Shephard)dwarf/semi dwarf variety, and over the past week almost all have black spots on them! At first I suspected sunburn, so moved them into a more sheltered location, but the black appears on both sides of the trunk/ branches on some. The black spots are mostly found around the base of the trunk, grafting point and some arms. A couple of branches have completely died back, gone black and softened. I suspect disease, but not sure what I should treat with? They are still in the original black bag I bought them in as I'm waiting for weather to cool to plant them in the ground. See attached pictures. Can anyone offer advice?
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Time: 18th March 2015 4:13pm

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About the Author Amanda19
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Brendan says...
Hi Amanda19, gee they look sick! They may be too far gone:-(
Try spraying your avo trees with: 30g (level tablespoon) of Copper Oxychloride mixed with 4

Time: 19th March 2015 3:52pm

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About the Author Brendan
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Amanda19 says...
Thanks Brendan. I ended up buying some Yates anti fungal solution which contains copper and targets anthracnose and black spots. I didn't get a chance to use it yesterday so was going to give it a crack today? would mixing straight copper be better do you think? Can't believe I've only had them a little over 2 weeks and they've taken such a turn!

Time: 19th March 2015 7:51pm

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Original Post was last edited: 19th March 2015 7:51pm
About the Author Amanda19
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Brendan says...
Hi Amanda19, yes that Yates product should work fine, please don't use 'straight copper' as in copper sulphate, as it will kill your trees.
Don't forget to use a wetting agent like Spredmax or Chemwet, please don't use a soil wetter for the wetting agent.
And spray once a week for 3 or 4 weeks, or more.

Time: 20th March 2015 8:50am

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888 says...
Hi There,
My ntree has lots of avocado but they are falling,while still relatively small,with black marks on them,would anyone know the cause.
thanks
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Time: 22nd January 2019 3:09pm

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About the Author 888
Endeavour hills
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