Re: black soot on lemon leaves


Maybe sooty mold.  Check your lemon for aphids, scales, ants, and
mealybugs. Typically the result of homopteran insects feeding and
excreeting honeydew, which in turn feeds the fungus that manifests itself
as sooty mold.
MTF

On Sun, 5 Mar 2000, barbara sargent wrote:

> There is a mysterious thick, black soot covering the leaves of my Meyer
> lemon tree. The tree is around 15 feet from the trunks of my neighbor's
> redwood tree. It's in our backyard which is quite far from the street. In
> other words, I can't figure out where this soot may be coming from except
> from the redwood debris.
> 
> We've had intense rains here in the SF Bay Area and even these don't clean
> the stuff off. Of course some of the tree is under the thick branches of
> the redwood but much of it isn't. Well-some of them look like they're not
> under branches because the branches they're under are from 20 to at least
> 100 feet high.
> 
> Any ideas about what this nasty stuff could be and what can be done about
> it (other than hand cleaning each leaf every week or so!)?
> 
> Barbara
> 



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