Insect and Spider Identification: CLOSED: On my semps, 1 by bigred

bigred wrote:
Sorry about the poor quality. Size and shape of aphid but flat body,no legs ,head or eyes that can be seen w/ naked eye,white,only moves when prodded and very slowly. I've tried sharp blast of water,Safer Soap and most effective if re-applied every 6 weeks, a systemic.....but what thew heck are they? I've been fighting them for years and they never seem to do any noticable damage.I'm sure long term,un-attended they would. Only on my potted semps but not on ones in the rock garden.

P