Shining Flea Beetle
Q: I found the identity of this critter in a garden forum but I have not been able to find out if it is a friend or foe. About 10 of them were on my chaste tree, Vitex agnus-castus.
A: I found some other references. Since it was *feeding* on the plants noted, I guess it is a foe….but I don’t think you should control it until you see definite damage. Maybe it will be naturally controlled without your intervention.