It's def a type of bug doin it, I would bet money, some of mine have none, some are loaded, I cover the dirt with diamatacious earth an sprY with Capt Jack's every other day, finally gotten in check , but they will target the healthyer plants first I believe ,, seriously spray them now before they get infested.. it's hard for me cause the plants are 6-8ft tall lol but I suggest u hittem hard now.. then again a few days later, I would keep spraying even if u stop seeing them just to keep then away. The Capt Jack's is a spinosaid , it's a bacterial that kills the bug not a chemical , stay away from the check.ical ones that are systemic, as they get inside the plant an stay.. an will be in the bud ,so use those as a last resort