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Jacobaea vulgaris, syn. Senecio jacobaea, [2] ... In some countries it is an invasive species and regarded as a noxious weed. In the UK, where it is native, ...
It is used as an agent of biological pest control against the nectar-rich noxious weed known as ragwort (Senecio jacobaea reclassified as Jacobaea vulgaris). The adult beetle is light golden brown in color and between 2 millimetres (0.079 in) and 4 millimetres (0.16 in) long. The female is larger than the male, especially when gravid.
A mature cotton thistle, an invasive weed in Australia.. A noxious weed, harmful weed or injurious weed is a weed that has been designated by an agricultural or other governing authority as a plant that is harmful to agricultural or horticultural crops, natural habitats or ecosystems, or humans or livestock.
Botanophila seneciella, the ragwort seed fly or ragwort seed head fly, is a fly species in the family Anthomyiidae.. Larvae feed within seed heads of Jacobaea vulgaris (the tansy ragwort), often destroying all of the developing seeds. [4]
Some members of Asteraceae are economically important as weeds. Notable in the United States are Senecio jacobaea (ragwort), [35] Senecio vulgaris (groundsel), [36] and Taraxacum (dandelion). [37] Some are invasive species in particular regions, often having been introduced by human agency.
Certain members of the genus Jacobaea (a segregate of Senecio): Jacobaea vulgaris, (common) ragwort or, only in the USA tansy ragwort, a very common wild flower in Europe, widely naturalised elsewhere; Jacobaea aquatica, water ragwort, marsh ragwort; Jacobaea erucifolia, Hoary ragwort; Certain members of the genus Packera including:
Jacobaea is a genus of flowering plants in the tribe Senecioneae and the family Asteraceae. Its members used to be placed in the genus Senecio , [ 2 ] but have been separated into the segregate genus Jacobaea on the basis of molecular phylogenetics in order to maintain genera that are monophyletic .
Jacobaea aquatica: Marsh ragwort Jacobaea erucifolia: Hoary ragwort Jacobaea maritima (formerly Senecio cineraria) Silver ragwort * Jacobaea paludosa: Fen ragwort Jacobaea vulgaris (formerly Senecio jacobaea) Common ragwort Senecio cambrensis: Welsh groundsel Senecio doria: Golden ragwort * Senecio doronicum: Chamois ragwort * Senecio ...