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Photo#34272
Cottony Cushion Scale? - Icerya purchasi
Copyright © 2005 Chuck Entz

Cottony Cushion Scale? - Icerya purchasi
Encino, Los Angeles County, California, USA
September 3, 2005
Size: 1/2 inch
On native birch (Betula occidentalis) in my backyard. I've also seen it on several other unrelated plants.

Notice the Argentine Ant (Linepithema humile) in attendance.
Contributed by Chuck Entz on 10 October, 2005 - 7:29pm
Last updated 15 January, 2007 - 6:35pm

Cottony Cushion Scale
I am pretty confident that you are right; no other insect can be mistaken by this one; so I am moving it to the guide.
… Beatriz Moisset, 11 October, 2005 - 7:35am

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