Bifenthrin is a pyrethroid pesticide with a mainly contact killing effect. It has a broad insecticidal spectrum and mainly acts on ion channels. Spiraltetram is a quaternary acid agent with systemic conductivity that can inhibit the lipid synthesis of pests. The two are complementary in terms of insecticidal spectrum, mode of action and mechanism of action, and can effectively control gray weevil and psyllid on citrus trees.