| Common Name: | Tansy ragwort |
| Family: | Asteraceae |
| Genus: | Senecio |
| Species: | jacobaea |
| Classification/Rank: | Very Invasive |
| Method of Transportation: | Spreads mainly by seed dispersal by wind, within 10 m of the original infestation, but seeds can be transported in soil carried on equipment and vehicles, as well as by people and livestock. |
| Habitat/Range: | • one large site reported on Haida Gwaii. • several sites reported in the PG and Robson Valley IPMAs in 2006 |
• biennial or short lived perennial herb from taproot; grows 0.2 to to 1.0 m tall
• stems erect, solitary or several branched above, sparsely to densely white woolly-hairy
• basal leaves broadly lance shaped, stalked, 2 to 3 times pinnately cut, smooth; stem leaves similar, reduced upwards becoming unstalked
• flowers yellow; several to numerous clusters
Land owners and managers have long recognized the need to control invasive plants to limit their impacts. In May 2018, a new smartphone app...
Bioagents are one tool in the fight against invasive plants, and they are intensly studied before release to ensure they won't switch to...
