Little green bugs on all plants

Hi,

It seems I just discovered both my cilantro and dille were full of green bugs. I immediately threw them away but seems all plants have a tiny amount of these very very small green bugs. I assume it’s fair to assume to best start over, but what are these called and how can I prevent it from happening again?

Thanks,
Laura

A post was merged into an existing topic: Pests- Aphids