Likely aphid

Usually found on stems and undersides of leaves, especially on new plant growth. The photo is too indistinct to confirm the identification.

Feeds by sucking sap from plants using piercing mouthparts.

Often forms colonies and reproduces rapidly; many species produce winged individuals when crowded or when host plants deteriorate.

Large colonies can weaken plants and spread plant viruses. Aphids also provide food for lady beetles, lacewings, and other beneficial predators.