Vector transmission of konjac mosaic virus to calla lily (Zantedeschiaspp.) by aphids

Various viral diseases and bacterial soft rot are the major limiting factors for the cultivation of calla lilies (Zantedeschiaspp.). Konjac mosaic virus (KoMV) is one of the major causal agents of viral diseases in calla lily fields in Taiwan. The objectives of this study are to identify potential insect vectors of KoMV and to assess the biotic and abiotic factors affecting aphid transmission of KoMV to calla lily. In this study, we identifiedMyzus persicaeandAphis gossypiias potential vectors of KoMV. Early-instar nymphs, late-instar nymphs, apterous adults and alate adults of both aphid species were able to transmit KoMV, and no significant differences in the transmission rates were detected. The difference in KoMV transmission rates was not detected when the transmission assays were performed at 18, 23 and 28 degrees C. Transmission biology is a crucial component of plant disease epidemiology caused by viruses. Vector propensity and vector activity need to be further investigated in the field. The knowledge will be valuable for developing disease control strategies for KoMV in calla lily fields.