General biosecurity duty (as Conyza species).
http://weeds.dpi.nsw.gov.au/Weeds/Details/208
Schmidt-Lebuhn AN, Chen SH, Lepschi BJ. (2026) Which species of ‘Conyza’ (Erigeron) occur in Australia?. Australian Systematic Botany 39, SB25014. https://doi.org/10.1071/SB25014 (Includes a key to the species occurring in Australia)
Erigeron canadensis is listed in the following regions: