in the 60,s i remember them coming around campsites etc spraying with tractors and big tanks .
you do have to remember lots of spanish coast was un inhabited for centuries . it was rice fields . thats why most villages are a few km inland . the plague area was just for going to in the day. mozzies love rice fields .
if it wasnt for daft english and german tourists there probably wouldnt be any houses etrc near the coast in most of med spain .
Sorry for slow response but lost wifi connection. We are now at Roses (Joncamar) and status normal i.e. take usual precautions. Seems the problem area is/was Empuriabrava just down the coast. The wife of the couple we met didn't have a square inch of visible skin that didn't have a bite. Surprised she wasn't in hospital.