White spots on ficus?

We have sixteen ficus columns in our yard. Some of them have developed these white and brown spots on them. Any idea what this is and how to treat it?

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1 Comment To "White spots on ficus?"

#1 Comment By BushDoctor On 12/05/2018 @ 11:32 am

Yes, this is a very severe fungal infection. The course of action from here will be dolomitic lime and wettable sulfur applied together near the base of the trees, but not touching the trunk.

This treatment will recondition the soil along with destroying the infection. Should this be too vigorous of an infection, then the next method of treatment will require copper fungicides. These may also damage the trees.

Treatment will not result in the damage done already disappearing, but will stop new damage from forming. This may not be apparent for at least two weeks. You will know when all new growth looks unaffected.

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