Editing Jacobaea vulgaris (section)

===Biological control===
[[File:Ragwort and caterpillars, Croucheston - geograph.org.uk - 1388879.jpg|thumb|right|Flowering plant with cinnabar moth caterpillars]]
Ragwort is a [[Larval food plants of Lepidoptera|food plant]] for the larvae of ''[[Cochylis atricapitana]]'', ''[[Phycitodes maritima]]'', and ''[[Phycitodes saxicolais]]''. Ragwort is best known as the food of [[caterpillar]]s of the [[cinnabar moth]] ''Tyria jacobaeae''. They absorb alkaloids from the plant and become distasteful to predators, a fact advertised by the black and yellow warning colours. The red and black, day-flying adult moth is also distasteful to many potential predators. The moth is used as a control for ragwort in countries in which it has been introduced and become a problem, like [[New Zealand]] and the western [[United States]].<ref>{{cite journal |doi=10.2307/1941900 |pmid=27755672 |jstor = 1941900 |title=Successful Biological Control of Ragwort, Senecio Jacobaea, by Introduced Insects in Oregon |journal=Ecological Applications| volume = 1 | issue = 4| pages = 430–442 | year = 1991 |last1 = McEvoy| first1 = Peter| last2 = Cox| first2 = Caroline| last3 = Coombs| first3 = Eric |bibcode=1991EcoAp...1..430M |s2cid = 21701854}}</ref>  As both larvae and adults are distinctly colored and marked, identification of cinnabars is easy outside of their natural range, and grounds and range keepers can quickly recognize them. In both countries, the [[tansy ragwort flea beetle]] (''Longitarsus jacobaeae'') has been introduced to combat the plant. Another beetle, ''[[Longitarsus ganglbaueri]]'', also feeds on ragwort, but will feed on other plants as well, making it an unsuitable biological control.<ref>{{cite journal |title= Biological Control of Ragwort (''Senecio jacobaea'' L.) in Australia |last1=McLaren|first1=D. A. |last2=Ireson|first2=J. E. |last3=Kwong|first3=R. M. |journal= Proceedings of the X International Symposium on Biological Control of Weeds |pages=67–79 |year= 2000}}</ref> Another biological control agent introduced in the western United States is the ragwort seed fly, although it is not considered very effective at controlling ragwort.<ref>{{Cite journal |last1=Filley |first1=Shelby |last2=Hulting |first2=Andy |last3=Pirelli |first3=Gene |last4=Coombs |first4=Eric |date=Aug 2011 |title=Tansy Ragwort |journal=Ag - Weed Management |publisher=Oregon State University Extension Service |url=https://extension.oregonstate.edu/pests-weeds-diseases/weeds/tansy-ragwort}}</ref> The biological control of ragwort was already used in the 1930s.<ref>{{cite journal |jstor = 2256123 |doi = 10.2307/2256123 |title = A Study of the Natural Control of Ragwort (''Senecio Jacobaea'' L.) |journal = The Journal of Ecology |volume = 23 |issue = 2 |pages = 265–322 |year = 1935 |last1=Cameron |first1=Ewen|bibcode = 1935JEcol..23..265C }}</ref>