u/Gardeningchannel

I have a beautiful big broccolini plant that’s Im so proud of and it’s giving my broccolini, then these little blighters show up. I cut off the branch with then on and threw them in the bin. The branch is an offshoot from the main stem. The main stem doesn’t seem to have any on them.
There are some plants nearby in another pot that have this pest on them, I plan to pull them out and chuck them because the soil there is no good.

What should I do about them?

Victoria se suburbs, self watering planter.

Thank you in advance :)