Insects Or Something Sprayed

This could be insect damage from Thrips (singular or plural), but it doesn’t really look like what we’d expect from them, so we’re wondering if some kind of liquid was recently sprayed near these plants? The specs appear very tiny in your photo, like what we’d expect from very tiny droplets, or mist, falling on the leaves. We’re leaning toward that (without being able to see the entire plant) because it appears from the photo that the specs are all on the upper leaves, and if on the lower leaves, only on those parts of the leaf that are not covered by leaves above them. This is commonly what we see when some mist from a sprayer has inadvertently landed on the leaves from above. If you know for certain that nothing like that has occured, then we suggest you keep an eye out for these same specs as the new leaves continue to grow and expand. If you begin to see this same thing on those leaves, then you can be pretty sure its the Thrips. We’ve included a link about these insects for your reference. Be aware that these Thrips are very tiny (either black or yellow/gold) cigar-shaped insects that may or may not be seen by you (you usually just happen to come across them while inspecting plant parts). If you find anything on the underside of the leaves that corresponds with the specs on the upper side, please send us a new photo of what you find and we’ll look at that.
http://www.ipm.ucdavis.edu/PMG/PESTNOTES/pn7429.html