California accidentally imported Argentine ants in the early 1900s, but the invasive insects now protect aphids across citrus orchards, allowing sap-sucking pests to multiply and damage millions of dollars’ worth of fruit each year

Invasive Argentine ants arrived in California during the early 1900s and now threaten citrus fruit supplies. These ants protect aphids, which are pests that damage citrus trees significantly. This symbiotic relationship causes millions of pounds in losses for citrus growers annually. Modern research suggests breaking this ant-aphid bond to restore natural orchard balance. Applying sticky barriers to tree trunks prevents ants from reaching their aphid partners.