CsBML1, CsBML2, and CsBML3 possess three conserved mannose binding sites.
The expression of all three lectins was upregulated by bacterial infection.
Recombinant lectins bound to a wide arrange of bacteria with different affinities.
All three lectins had mannose-specific and Ca2+-dependent agglutinating capacities.
rCsBML1 and rCsBML2 are bactericidal and inhibited bacterial infection in vivo.