Response of two Canada thistle (<i>Cirsium arvense</i>) varieties to herbicides

Eskandar, Zand; Beckie, Hugh J.; Myhre, C. D.; Loeppky, H. A.

doi:10.4141/p01-168

Cited by 4 publications

(2 citation statements)

References 5 publications

(7 reference statements)

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“…In Great Britain, Hungary and North America, ecotype differences in susceptibility to auxin analogue herbicides such as MCPA, 2,4-D and dicamba were also observed (Abel, 1954;Hodgson, 1970;Lee, 1971;Hunter & Smith, 1972;Solymosi et al, 1987). Similar effects on the above ground dry matter production of C. arvense have been reported for the ALS-inhibitors chlorsulphuron, tribenuron-methyl and triasulphuron (Frank & Tworkoski, 1994;Solymosi & Nagy, 1998), the Photosystem II inhibitors triazines (Bachthaler et al, 1983), atrazine, hexazinone (Carson & Bandeen, 1975;Zand et al, 2002) and clopyralid (Frank & Tworkoski, 1994) and the carotenoid biosynthesis inhibitor amitrole (Hodgson, 1970;Sadiak & Marriage, 1976). Frank and Tworkoski (1994) showed that clones of C. arvense from different parts of North America varied significantly in their response to glyphosate (inhibition of EPSP synthase).…”

Section: Introductionsupporting

confidence: 52%

Selection inCirsium arvense(L.) Scop. andSonchus arvensisL.: Susceptibility to MCPA on different types of farmland in Sweden

Fogelfors

Lundkvist

2008

Acta Agriculturae Scandinavica, Section B - Soil & Plant Sc

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During the past century, changes in cropping systems have led to selective pressure on weed flora. The number of competitive species with decreased susceptibility to herbicides has increased, at the cost of more susceptible species. For a long period, the economically important perennial weed species Cirsium arvense (L.) Scop. and Sonchus arvensis L. have mainly been controlled by the herbicide MCPA (phenoxy-acetic acid), which stimulates the weed plant to abnormal growth. However, it has been reported from Sweden, Great Britain, Hungary and North America that C. arvense has become less susceptible to MCPA since the 1950s. Therefore, two greenhouse experiments were performed at Uppsala, Sweden with clones of C. arvense and S. arvensis. The purpose was to study whether ecotypes (clones) from high input farmland, where herbicides had been used intensively and regularly for a long time, were less susceptible to herbicide (MCPA) treatment than ecotypes from low input farmland. Sixty clones of C. arvense and 36 clones of S. arvensis were treated with nine different doses of MCPA. The results supported the suggestion that a shift towards less MCPA-susceptible ecotypes of C. arvense had occurred on high input farmland. Clone material from such farmland had, on average, significantly higher dry matter content after herbicide treatment than ecotypes from low input farmland. Similar decrease in susceptibility was not detected for S. arvensis. This was probably due to S. arvensis generally being less susceptible to MCPA than C. arvense. Sonchus arvensis has therefore being exposed to a lower selection pressure than C. arvense.

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Section: Introductionsupporting

confidence: 52%

Selection inCirsium arvense(L.) Scop. andSonchus arvensisL.: Susceptibility to MCPA on different types of farmland in Sweden

Fogelfors

Lundkvist

2008

Acta Agriculturae Scandinavica, Section B - Soil & Plant Sc

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“…Little is known about the mode of action of diflufenzopyr with auxin herbicides, which seems to be dependent on a herbicideweed species-weed growth stage interrelationship. Canada thistle plants were propagated from the same field location for these studies, but it is possible different ecotypes were propagated, which differ in susceptibility to 2,4-D or diflufenzopyr, or both (Hodgson 1970;Hunter and Smith 1970;Zand et al 2002), which confounded the results. In both studies, clopyralid efficacy on Canada thistle was enhanced by diflufenzopyr, but the enhancement with other herbicides when applied with diflufenzopyr was less pronounced, if present at all.…”

Section: Resultsmentioning

confidence: 99%

Diflufenzopyr Influences Leafy Spurge (Euphorbia esula) and Canada Thistle (Cirsium arvense) Control by Herbicides

Lym

Deibert

2005

Weed technol.

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Diflufenzopyr is an auxin-transport inhibitor that has increased broadleaf weed control by some auxin herbicides. The effects of auxin herbicides when applied with diflufenzopyr for leafy spurge or Canada thistle control, herbage production, and herbicide absorption and translocation in leafy spurge were evaluated. The influence of diflufenzopyr on leafy spurge and Canada thistle control varied by herbicide. Diflufenzopyr applied with quinclorac increased both Canada thistle and leafy spurge control. Diflufenzopyr added to picloram increased leafy spurge but not Canada thistle control, whereas control of both weeds generally increased when diflufenzopyr was applied with dicamba. Canada thistle control slightly improved when diflufenzopyr was applied with clopyralid or clopyralid plus 2,4-D compared with the herbicides alone. Diflufenzopyr did not influence weed control from imazapic and reduced weed control from glyphosate. Weed control was not influenced by the ratio of diflufenzopyr to herbicide or by whether diflufenzopyr was tank mixed with or applied before the herbicides. Diflufenzopyr did not affect cool-season grass production in the greenhouse or field but did reduce sideoats grama and switchgrass production when applied alone and with dicamba in greenhouse trials.14C-picloram and14C-quinclorac absorption was increased when applied with diflufenzopyr in leafy spurge but nearly all absorbed herbicide remained in the treated leaf compared with the herbicides applied alone.14C-dicamba absorption decreased from 60 to 14% when applied with diflufenzopyr and translocation to the roots decreased by a factor of 10. Overall, the increase in weed control from the addition of diflufenzopyr was much more pronounced with leafy spurge than with Canada thistle.

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Morphological variation in different populations of Aceria anthocoptes (Acari: Eriophyoidea) associated with the Canada thistle, Cirsium arvense, in Serbia

2007

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The russet mite, Aceria anthocoptes (Nal.), is the only eriophyid that has been recorded on Canada thistle, Cirsium arvense (L.) Scop. It has been noted in several European countries and recently in the USA. With its apparent host specificity and because of the damage it causes to its host plant, A. anthocoptes is being studied as a potential candidate for classical biological control. The aim of the present study was to examine quantitative morphological traits in four populations of A. anthocoptes living on two infraspecific host plant taxa (C. arvense var. arvense and C. arvense var. vestitum) in two geographically separate areas of Serbia in order to test the hypothesis of absence of the possible host plant impact on mite morphology. MANOVA analysis revealed significant differences between populations from different localities in Serbia. Populations of A. anthocoptes inhabiting two thistle varieties in the vicinity of Belgrade differed significantly from mites inhabiting the same two host varieties in the vicinity of the town of Ivanjica. Canonical discriminant analysis showed that the trait which best discriminates the populations of A. anthocoptes is the number of dorsal annuli. It was not possible to ascribe morphological differences to the impact of the host plant.

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Response of two Canada thistle (Cirsium arvense) varieties to herbicides

Cited by 4 publications

References 5 publications

Selection inCirsium arvense(L.) Scop. andSonchus arvensisL.: Susceptibility to MCPA on different types of farmland in Sweden

Selection inCirsium arvense(L.) Scop. andSonchus arvensisL.: Susceptibility to MCPA on different types of farmland in Sweden

Diflufenzopyr Influences Leafy Spurge (Euphorbia esula) and Canada Thistle (Cirsium arvense) Control by Herbicides

Morphological variation in different populations of Aceria anthocoptes (Acari: Eriophyoidea) associated with the Canada thistle, Cirsium arvense, in Serbia

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