Described is a binding domain, preferably an antigen binding domain, more preferably an antigen binding domain that specifically binds a binding site on an insect. More specifically, described are antigen binding domains comprising an amino acid sequence that comprises 4 framework regions and 3 complementary determining regions, whereby the antigen binding domains are capable to bind specifically to an insect as a whole, preferably to a binding site on the insect surface. Further described is the use of the binding domain to deliver a compound, preferably a biologically active agent to the insect, and to insecticidal compositions comprising the binding domain.
