No, it's not a chemical bug spray or even citronella candles.
The Westchester County Health Department is giving away minnows.
Officials say the little fish can have a big impact on the disease-carrying bugs.
A tasty lunch for a fathead minnow is mosquito larvae.
The health department hopes people will put the minnows in their ornamental ponds.
The fish have already proved effective mosquito munchers in county parks.