Talk:Jacobaea vulgaris

message: hi MPF,
My source for teh scottish origin was 
http://www.crescentbloom.com/Plants/Specimen/SE/Senecio%20jacobaea.htm
which generally I found a reliable source.
What source do you have for removing it?
TeunSpaans 19:04, 15 Oct 2004 (UTC)
thread_title:  Scottish origin 

message: I changed the maximum height of Tansy Ragwort to 2 meters. I am the manager of a noxious weed control program on the west coast of Canada and we commonly find plants growing to 2+ meters in height. — Preceding unsigned comment added by 207.194.58.93 (talk • contribs) 
:I can support this also for the UK.  I am the Research manager for Ragwort-UK ltd and have frequently recorded plants over 2m tall growing in fertile land with good water supply.  These are not rare strains of ragwort, any plant can reach these proportions if given the right conditions.  These giants typically have ca 12 major stems originating from the crown and the total seed production has been estimated to be in excess of 2 million seeds for the whole plant. -- DerekSmith 
:I have removed the following paragraph.
::Since 1996, the population of Ragwort in the UK has substantially increased due to Wolf-Sheep Predation Dynamics and 1988 success of Ragwort's only major predator, the Cinnabar Moth.
::The population of ragwort has continued to grow since the early nineties and is now becoming a problem for animals. Ragwort is highly toxic to animals. Usually horses are able to discriminate the ragwort, see Poisonous effects. Horses have eaten it in hay, or ironically after it has been cut down after trying to protect the horses.
:— Preceding unsigned comment added by Neilj (talk • contribs) 
:There is someone who is trying to promote the idea that the cinnabar moth has undergone a population crash in the UK and that consequently a plague of ragwort has ensued as it supports the sale of the moths as a biological control. It has got repeated many times as a result of a marketing campaign. However, as any competent British entomologist ( insect specialist) will tell you, this is not so. The moth has remained common and whilst in common with most British moths a decline in numbers can be shown statistically there is no known correlation with any increase generally in the ragwort population.
:Ragwort has not increased either. There is no plague. The remainder of the paragraph simply repeats information that is better covered elsewhere in the article, therefore I deleted it.
:-- Neilj
::Neilj, you have a contradiction.  In one sentence you state that there is no decline in Cinnabar numbers, yet in the next sentence you state that the Cinnabar along with all other British moths is in in decline.  Your contradiction destroys the validity of your argument.
::You then go on to state that ragwort is not on the increase, yet you offer no proof of your opinion.  I on the other hand have factual audit data which I am prepared to provide to the Wikepedia admins to prove that ragwort is significantly on the increase in land where its presence is not being managed.
::-- DerekSmith  —Preceding unsigned comment added by DerekSmith (talk • contribs) 15:41, 22 September 2007 (UTC)
thread_title:  Height of Tansy Ragwort 

message: The correct name is Jacobaea vulgaris I don't know how to change it correct in Wiki.
The primary source for the new name 
Pelser, P. B., Gravendeel, B. & van der Meijden, R., (2002). Tackling speciose genera: species composition and phylogenetic position of Senecio sect. Jacobaea (Asteraceae) based on plastid and nrDNA sequences. Am.J.Bot. 89(6): 929-939 
Pelser, P.B., Veldkamp, J.-F. & van der Meijden, R., (2006). New combinations in Jacobaea Mill. (Asteraceae - Senecioneae). Compositae Newsletter 44: 1-11.  —Preceding unsigned comment added by Falka (talk • contribs) 21:30, 13 March 2008 (UTC)
thread_title:  the correct scientifical name 

message: I went to check the relative commonness of Jacobaea vulgaris vs Senecio jacobaea in Google's ngram viewer, and found that the former doesn't get any hits (which is surprising, because if one performs a regular Google Books search for it, it does get hits). -sche (talk) 18:55, 11 September 2013 (UTC)
thread_title:  Scientific names 

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thread_title:  External links modified 

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thread_title:  External links modified 

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thread_title:  External links modified (January 2018)