Ridding argentine ants in small vertebrate funnel traps?

[J. L. Kunna]

Hi,
Looking for advice on how to deal with non-native Argentine ants swarming
over and killing small animals caught in my mesh funnel traps attached to
drift fences.
An ant-specific poison registered for outdoor use that doesn't affect other
invertebrates would be nice.
Any other info would be helpful too.  The study is on the effect of
prescribed fire, and I'd rather not confound it with a huge ant eradication
project.
Thanks,
John