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California, United States

Disease/Pest ID? This happened rapidly to my two tree mallows. Can anyone identify? In San Diego area, zone 10a. Thanks!




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it is a fungal infection called rust. those lesions you have on the leaf is this fungus's mushroom. they release the sores.[fungal seeds]

you can spray with a fungicide, see what your garden centres offer. but they may be too far gone to save them.

6 Apr, 2019

 

Thanks. I cut it back hard, removed all infected leaves, replaced mulch, and sprayed with organic fungicide. Let’s hope it recovers

7 Apr, 2019

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