The present invention is related to bait which is water resistance, especially for fire ants. Its water resistance, anti-oxidation and the use of fire ants favorite eating formula which can mix with different toxic substance, and the production is easy and low cost, suitable for use in Taiwan or other humid areas to control fire ants.本發明係有關於一種耐水性之餌劑,尤其作為火蟻餌劑使用,其耐水性、抗氧化並具有火蟻喜食用的配方,可搭配不同的有毒物質,製作容易且成本低,適合在台灣或其他潮濕的地區施用以防治火蟻。