[Arid_gardener] White foamy substance on plant

[Bill Woody]

We have a Salvia Clevelandi (blue sage) which has several small balls or
clumps of white sticky substance looking like hand soap foam on it.  Each is
about 1/4 or 3/8 inch diameter.  Can someone identify this and describe
treatment, if any is needed?  Thanks very much.
 
Bill Woody
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