Aphids.

If youre still in veg here are some methods to nuke them into oblivion:

• use clear sticky tape to remove the visible ones
• wrap some yellow sticky traps around the base of the main stem, inner edges of pot, and flat on the medium -add a layer of diatemacous earth over your growing medium
• make a mixture of soap, vinegar and water, dip a rag into the mixture, wipe both on top and under each leaf, alternate with a mixture of soap, isopropyl alcohol and
• boil some water for 15 minutes with cayenne peppers, onions and garlic, strain out the solids and apply as a foliar drench once cooled
• use an essential oil diffuser with things like rosemary, peppermint, lemon, basil and tea tree oil -neem oil
• predatory insects like ladybugs