Host-plant resistance associated with Poncirus trifoliata influence oviposition, development and adult emergence of Diaphorina citri (Hemiptera: Liviidae).

Based on reduced oviposition and delays in development, P. trifoliata exhibits a combination of antixenosis and antibiosis host-plant resistance to D. citri. A companion plant assay showed that the presence of C. macrophylla stimulated higher oviposition rates on P. trifoliata, but nymph development remained retarded on P. trifoliata. Here, we show that the antixenosis associated with trifoliate accessions can be overcome to some extent by the presence of a preferred susceptible host plant; but in combination with antibiosis P. trifoliata remains an inferior host plant. © 2018 Society of Chemical Industry.