Invasive Species Compendium

Detailed coverage of invasive species threatening livelihoods and the environment worldwide

Abstract

Invertebrate pests of pasture as potential plant virus vectors.

Abstract

The potential of Listronotus bonariensis, Deroceras reticulatum and Wiseana spp. as vectors of cocksfoot mottle virus and ryegrass mosaic virus was investigated in the laboratory at 20°C and LD 16:8. The invertebrates were allowed to feed on infected plant material before being placed individually on uninfected plants. These plants were grown on before being assayed for the presence of virus by ELISA. Faeces from slugs and Wiseana were also tested for the presence of virus. One individual of L. bonariensis transmitted ryegrass mosaic virus to ryegrass (Lolium perenne) and an unknown virus to cocksfoot (Dactylis glomerata). Deroceras reticulatum did not transmit ryegrass mosaic or cocksfoot mottle virus to ryegrass or cocksfoot resp. Wiseana did not transmit cocksfoot mottle virus to cocksfoot. Ryegrass mosaic virus and cocksfoot mottle virus particles were found in the faeces of slugs and cocksfoot mottle virus was detected in Wiseana faeces. A previously unrecorded virus was detected during the course of these experiments. A chance finding implicated Rhopalosiphum sp. in the transmission of cocksfoot mottle virus.