Abstract Background The predatory mites, Neoseiulus californicus (McGregor), N. barkeri (Hughes), and Amblyseius swirskii Athias-Henriot, are important predators attacking many insect mite pests. They can coexist in the same habitat engage intraguild predation (IGP). Main body IGP was assessed among exotic one native species A. as Intraguild predator (IG-predator)/intraguild prey (IG-prey) eith...