It could be the Leaf mining fly. We get some here also. If it is, it looks worse than it is. The plant will grow faster than they can do damage to it in most cases. I don’t even worry about it.
Give neem oil a try. All mine, except one that's 3 weeks away from harvest is getting sprayed tonight. I've never had to use it on my weed before but I do use it weekly on citrus for scales and peas for PM. Good luck!
Plumbers grasshoppers are totally different from mine. Just ran outside and snapped this picture. (They'll get at least 4 times this size in another month.)
Prepare for OD: ( always rotate your pesticide so no pest can be resistant or your pesticide becomes worthless/ needs more + a lot of pesticides have max seasonal sprays )
—- Spinosad: Conserve sc ( awesome knockout to most soft bodies )
Neem extract : Azaguard - insect growth regulator insecticide/nematicide Pyrethrins 5%: pyganic 5.0 ( anther great knockout to many species of pests) Chromobacterium subtsugae:Grandevo Burkholderia spp. strain A396: venerate xc ( awesome anti spider mites , even russets ! Many pests and even flower approved )
Reynoutria sachalinensis- Regalia ( fungicide switch with pesticide, every other time Inless heavy infestations)
All I have tried is a light original dawn dishsoap and water spray early in the morning for 4 days in a row started on friday morning ending on monday this week