Every year around this time I take my basil outside. After a couple of days maybe a week, transparent spots begin appearing in otherwise perfectly good leaves. Last year I had to throw it all away and start over inside.
This year I'm hoping to treat it early and save him, but I have no idea about what it could be. Here's a photo of the first spots appearing. They tend to be large single spots rather than diffuse transparent dots. No sign of webbing for what I can see, no visible insect anywhere.
UPDATE: I found this guy under one leaf, what is it? it's about 2mm long. Can I spray something to prevent further invasion?