I have some bullant nests in my backyard.. i got bitten a few...

I have some bullant nests in my backyard.. i got bitten a few times. The large ones can reach an inch & when they get you - the pain & swelling is unbelievable.

I have Bunnings - the ant-sand type sprinkle .. but they don't seem to work

I have mixed borax with syrup/honey - they don't eat it
I have tried borax with minced meat & salmom..nope they don't eat meat.. vegetarians?

ANy ideas to eradicate bull ants? I doubt they have any predators - they can even kill a rodent & small cat easy i reckon.