Griselinia leaves developing black spots!


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Can anyone help. My 3 year old griselinia hedge is developing these black spots! Last week I removed all affected leaves, but they are back again - in abundance! Ive attached a picture. Any idea what this is and what I can do to treat before I have a bare hedge?! Thanks in advance
 

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Purely a guess, but it may be "tar spot' , a fungi common to maple trees. It overwinters in the leaves so removing them for sanitation is good.
 
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Purely a guess, but it may be "tar spot' , a fungi common to maple trees. It overwinters in the leaves so removing them for sanitation is good.
Thankyou - I'm thinking it could be blackspot - another fungal disease, so I've removed the affected leaves, sprayed with a fungicide and will await the results!
 
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Welcome Adrianne. :) Griselinia can be prone to Phytothora which creates similar black patches to yours. Apparently it is currently a problem in New Zealand.
 
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We have found a few leaves on various Grissy plants that look like phytothora - what is the best fungicide to treat ?
 
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Phytophthora?

Potassium salts of phosponic acid. Bonus it is systemic and absorbs via foliar pathways as well as via roots. That oomycete is also known for sudden oak death and is a nasty water mold that will take out shrubbery and other plants and trees around your home. Is your plant staying too wet?
 
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