Invasive Species Compendium

Detailed coverage of invasive species threatening livelihoods and the environment worldwide

Abstract

Tobacco streak, broad bean wilt, cucumber mosaic, and alfalfa mosaic viruses associated with ring spot of Ajuga reptans in Australia.

Abstract

A. reptans plants at 3 locations in and around Melbourne, displaying ring spot, line pattern, scattered yellow spots and yellow leaf margins were infected singly by TSV (Ajuga-TSV), BBWV (Ajuga I-BBWV) and CMV. Plants at a 4th location showed a very mild chlorotic mottle, faint ring spot and contained AMV and BBWV (Ajuga II-BBWV) simultaneously. The Ajuga-TSV isolate was distinct from the Ageratum houstonianum isolate from Qd. in agar gel diffusion and cross-protection tests, and is apparently a new TSV str. occurring in Australia. Ajuga I-BBWV was serotype I of the virus whereas Ajuga II-BBWV is possibly a 3rd, previously unrecorded serotype. This is the first report of AMV and CMV in A. reptans in Australia and of A. reptans as a natural host of TSV and BBWV.