The blood suckers evolve resistance, but their predators don't, according to a new study in Costa RicaBy Jake BuehlerPUBLISHED MAY 31, 2019INSECTICIDES IN AT least one area are not only failing to control mosquitoes, new research suggests, they’re actually allowing the blood-sucking pests to thrive—by killing off their predators.The study, published this month in the journal Oecologia, reveals a new wrinkle in how insecticides may be impacting ecosystems. Mosquitoes in the study area in Costa Ri …