Ants in Plastic Compost Bin
Thanks for your e-mail.
The ant nematodes do not kill the ants but disperse them to other areas, watering them in from the top may drive them out but there is a danger they could return. You may need to apply more than once and water in thoroughly after applications.
I would also suggest applying some Agrothrin ant powder around the base, top and door to deter new ants entering the compost bin. I hope this helps.