Dicamba resistance in kochia

Cranston, Harwood J.; Kern, Anthony J.; Hackett, Josette Lynn; Miller, Erica K.; Maxwell, Bruce D.; Dyer, William E.

doi:10.1614/0043-1745(2001)049[0164:drik]2.0.co;2

Cited by 86 publications

(128 citation statements)

References 20 publications

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“…Whereas ALS-inhibitor resistance is conferred by a single dominant or semi-dominant gene, auxinic (dicamba) resistance in kochia is postulated to be a quantitative trait controlled by several recessive genes (Dyer et al 2000;Cranston et al 2001). If true, auxinic herbicide resistance should be less frequent and slower to evolve and spread than ALS-inhibitor resistance, which appears to be the situation to date.…”

Section: Response To Herbicides and Other Chemicalsmentioning

confidence: 99%

The biology of Canadian weeds. 138. Kochia scoparia (L.) Schrad.

Friesen¹,

Beckie²,

Warwick³

et al. 2009

Can. J. Plant Sci.

111

164

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Kochia [Kochia scoparia (L.) Schrad.] is an annual broadleaf weed species native to Eurasia and introduced as an ornamental to the Americas by immigrants in the mid- to late 1800s. Although sometimes categorized in the genus Bassia, there is no compelling reason for this classification. This naturalized species is a common and economically important weed in crop production systems and ruderal areas in semiarid to arid regions of North America, and has expanded northward in the Canadian Prairies during the past 30 yr. Although primarily self-pollinated, substantial pollen-mediated gene flow and efficient seed dispersal aids both short- and long-distance spread. The weed is morphologically highly variable, and its growth and development are markedly affected by environmental conditions. Kochia, a C4 species, is highly competitive in cropping systems because of its ability to germinate at low soil temperatures and emerge early, grow rapidly, tolerate heat, drought and salinity, and exert allelopathic effects on neighboring species. Moreover, herbicidal control has been compromised to some extent by the widespread evolution of herbicide resistance in the species. Kochia is used as a forage, is palatable to livestock with nutritional value similar to that of alfalfa (Medicago sativa), but can be toxic if it comprises the majority of the diet. Although kochia pollen is an allergen, the seed is a source of phytochemicals including mosquito pheromones and saponins that are potentially beneficial to human health; kochia also is beneficial in phytoremediation of soils contaminated by hydrocarbons or pesticides. Key words: Kochia, Kochia scoparia, Bassia scoparia, herbicide resistance, soil salinity tolerance, weed biology

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Section: Response To Herbicides and Other Chemicalsmentioning

confidence: 99%

The biology of Canadian weeds. 138. Kochia scoparia (L.) Schrad.

Friesen¹,

Beckie²,

Warwick³

et al. 2009

Can. J. Plant Sci.

111

164

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“…2,9 First documented in wheat fields near Fort Benton, Montana, in 1994, 10,11 the recent spread of dicamba-resistant kochia in six states in the Great Plains region seriously limits the herbicide tools to manage kochia under reduced-tillage systems of this region. 2,9 The current methods for discriminating between herbicide-resistant and susceptible weed biotypes involve whole-plant dose-response assays, shoot bioassays, Petri dish bioassays, target enzyme bioassays, and molecular/genetic markers specific to the resistance trait.…”

Section: Introductionmentioning

confidence: 99%

Discrimination of herbicide-resistant kochia with hyperspectral imaging

Nugent

Shaw

Jha

et al. 2018

J. Appl. Rem. Sens.

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Abstract. A hyperspectral imager was used to differentiate herbicide-resistant versus herbicidesusceptible biotypes of the agronomic weed kochia, in different crops in the field at the Southern Agricultural Research Center in Huntley, Montana. Controlled greenhouse experiments showed that enough information was captured by the imager to classify plants as either a crop, herbicidesusceptible or herbicide-resistant kochia. The current analysis is developing an algorithm that will work in more uncontrolled outdoor situations. In overcast conditions, the algorithm correctly identified dicamba-resistant kochia, glyphosate-resistant kochia, and glyphosate-and dicamba-susceptible kochia with 67%, 76%, and 80% success rates, respectively. © The Authors.Published by SPIE under a Creative Commons Attribution 3.0 Unported License. Distribution or reproduction of this work in whole or in part requires full attribution of the original publication, including its DOI.

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“…Dicamba-resistant kochia has not been identified previously in western Canada, but has been reported in the USA (Cranston et al 2001;Preston et al 2009). Resistance to glyphosate and ALS-inhibiting herbicides in kochia is target-site based: 5-enolypyruvyl-shikimate-3-phosphate synthase (EPSPS) gene amplification (Wiersma 2012; E. Westra, S. Martin, personal communication) and ALS mutation (Beckie, unpublished data).…”

Section: Resultsmentioning

confidence: 95%

Glyphosate-resistant kochia (Kochia scoparia L. Schrad.) in Saskatchewan and Manitoba

et al. 2015

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Ford, G. 2015. Glyphosate-resistant kochia (Kochia scoparia L. Schrad.) in Saskatchewan and Manitoba. Can. J. Plant Sci. 95: 345Á349. Previous surveys have documented the occurrence of glyphosate-resistant (GR) kochia in Alberta in 2011 and 2012. To determine the incidence of GR kochia in Saskatchewan and Manitoba, a stratified-randomized survey of 342 sites (one population per site) in southern and central regions of Saskatchewan and a similar survey of 283 sites in southern Manitoba was conducted in the fall of 2013. Mature plants were collected, seed threshed, and progeny screened by spraying with a discriminating glyphosate dose of 900 g ae ha Á1 under greenhouse conditions. Screening confirmed 17 GR kochia populations in nine municipalities in west-central or central Saskatchewan, but only two GR populations from different municipalities in the Red River Valley of Manitoba. While the majority of GR kochia populations in Saskatchewan originated in chemicalfallow fields, some populations were found in cropped fields (wheat, Triticum aestivum L.; lentil, Lens culinaris Medik.; GR canola, Brassica napus L.) and non-cropped areas (oil well, roadside ditch). In Manitoba, the two populations occurred in fields cropped to GR corn (Zea mays L.) and soybean (Glycine max L. Merr.). Agronomic and economic impact of this GR weed biotype is compounded because of consistent multiple resistance to acetolactate synthase-inhibiting herbicides. However, GR kochia is susceptible to dicamba, an increasingly important auxinic herbicide used for control of this multiple-resistant weed biotype. Pour e´tablir l'incidence de cette adventice GR en Saskatchewan et au Manitoba, les auteurs ont proce´deá`u ne enqueˆte ale´atoire stratifie´e a`342 sites (un peuplement par site) dans le sud et le centre de la Saskatchewan, puis ont effectue´une enqueˆte similaire a`283 sites dans le sud du Manitoba, a`l'automne 2013. Ils ont recueilli des plants matures, en ont re´colte´les graines et ont pre´se´lectionne´la proge´niture en la pulve´risant avec 900 g de glyphosate par hectare, en serre, aux fins de discrimination. La pre´se´lection a confirme´la pre´sence de 17 peuplements de kochie GR dans neuf municipalite´s du centre-ouest ou du centre de la Saskatchewan, mais seulement deux populations GR dans des municipalite´s diffe´rentes de la valle´e de la rivie`re Rouge, au Manitoba. Bien que la majorite´des peuplements de kochie GR de la Saskatchewan aient e´te´observe´s dans des jache`res chimiques, quelques-uns ont e´te´retrouve´s dans des cultures (ble´, Triticum aestivum L.; lentille, Lens culinaris Medik.; canola GR, Brassica napus L.) et sur des terrains en friche (puits de pe´trole, fosse´d'une route). Au Manitoba, les deux populations ont e´te´de´couvertes dans des champs de maı¨s GR (Zea mays L.) et de soja (Glycine max L. Merr.). L'impact agronomique et e´conomique de cette adventice GR est complexe, car la kochie pre´sente une re´sistance multiple aux herbicides qui inhibent l'ace´tolactate synthase. Ne´anmoins, la kochie GR est sen...

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Dicamba resistance in kochia

Cited by 86 publications

References 20 publications

The biology of Canadian weeds. 138. Kochia scoparia (L.) Schrad.

The biology of Canadian weeds. 138. Kochia scoparia (L.) Schrad.

Discrimination of herbicide-resistant kochia with hyperspectral imaging

Glyphosate-resistant kochia (Kochia scoparia L. Schrad.) in Saskatchewan and Manitoba

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