Paraquat and atrazine co-resistance in Conyza canadensis (L.) Cronq

Pölös, Endre; Mikulás, J.; Szigeti, Zoltán; Matkovics, B.; Hai, Do Quy; Párducz, Á.; Lehoczki, E.

doi:10.1016/0048-3575(88)90048-x

Cited by 63 publications

(17 citation statements)

References 30 publications

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“…A few populations of C. canadensis have developed multiple resistance to herbicides with different modes of action. Populations resistant to both paraquat and atrazine were discovered in Hungary (Lehoczki et al 1984;Pölös et al 1988). Populations resistant to both atrazine and chlorsulfuron (an ALS inhibitor) were identified in Israel (Heap 2001).…”

Section: Response To Herbicides and Other Chemicalsmentioning

confidence: 99%

“…Rosettes of C. canadensis can be effectively controlled by non-selective herbicides containing glyphosate (Bruce and Kells 1990) or glufosinate ammonium (Pölös et al 1988). Control with paraquat is variable.…”

Section: Response To Herbicides and Other Chemicalsmentioning

confidence: 99%

“…Paraquat-resistant populations have been identified in several orchards in Essex County, Ontario (Smisek et al 1998), as well as in Hungary, Japan and Mississippi, USA (Yamasue et al 1992;Tanaka et al 1986;and Pölös et al 1988;Heap 2001). Atrazine or simazine resistant populations occur in the United Kingdom, France, Belgium, Switzerland, Poland, Czechoslovakia, and Spain (Heap 2001).…”

Section: Response To Herbicides and Other Chemicalsmentioning

confidence: 99%

“…Various studies have quantified the rates of herbicide uptake and translocation, CO 2 fixation, fluorescence quenching and chloroplast ultrastructure in triazine resistant and susceptible biotypes of C. canadensis (Lehoczki et al 1984;Pölös et al 1988). Triazine resistance is conferred by a mutation at the target site of the herbicide in the chloroplast, and generally results in reduced fitness of the resistant biotype compared to the susceptible (Gronwald 1994).…”

Section: Growth and Developmentmentioning

confidence: 99%

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The biology of Canadian weeds. 115. Conyza canadensis

Weaver¹

2001

Can. J. Plant Sci.

243

291

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Weaver, S. E. 2001. The biology of Canadian weeds. 115. Conyza canadensis Can. J. Plant Sci. 81: 867-875. Conyza canadensis (L.) Cronq. (Canada fleabane, horseweed, mare's-tail) is a winter or summer annual, native to North America, and found in all provinces of Canada except Newfoundland. It is a weed of orchards, vineyards, roadsides, and arable fields where tillage has been reduced or eliminated. Most seedlings emerge from late August through October and form rosettes which overwinter. Large numbers of small, wind-dispersed seeds, ranging to over 200 000 seeds per plant, are produced in late summer. Populations of C. canadensis in more than ten countries have evolved resistance to herbicides such as paraquat, atrazine, chlorsulfuron or glyphosate. Several paraquat resistant populations were found in orchards in Essex Country, Ontario. It serves as a wild host of the tarnished plant bug, and of aster yellows, a mycoplasma disease transmitted by the aster leaf hopper. On la trouve dans toutes les provinces du Canada sauf Terre-Neuve. Elle envahit les vergers, les vignobles, les bords de route et les terres arables dont on ne travaille plus le sol, ou très peu. La plupart des plantules apparaissent de la fin du mois d'août à octobre et forment des rosettes qui hiverneront. La plante produit au-delà de 200 000 petites graines qui seront dispersées par le vent à la fin de l'été. Dans plus de dix pays, les peuplements de C. canadensis ont acquis une résistance à divers désherbants tels le paraquat, l'atrazine, le chlorsulfuron et le glyphosate. Plusieurs peuplements résistants au paraquat ont été découverts dans des vergers du comté d'Essex, en Ontario. La vergerette du Canada est l'hôte sauvage de la punaise grise et de la jaunisse de l'aster, mycoplasme transmis par la cicadelle de l'aster. Description and Account of Variation(a) Winter or summer annual, reproducing only by seeds; short taproot with laterals; seedlings form a basal rosette of dark green, sparsely hairy leaves, rarely more than 1 cm wide, with distinct petioles and coarsely toothed margins; the basal rosette deteriorates after the stem begins to elongate; stems are erect, 10-180 cm high, hairy, with many small flowering branches in the upper portions; stem leaves alternate, numerous and crowded on the stem, often appearing opposite or even whorled, lanceolate to linear, with nearly entire margins; upper stem leaves only 5 mm wide; flower heads (capitula) small, 3-5 mm in diameter, and numerous on short branches near the top of the main stem; pistillate ray florets are white, ligulate and very short, often concealed by involucre bracts around each head; perfect disk florets are yellowish-green and very fluffy at maturity; seeds (achenes), averaging 60-70 per capitulum, are small, 1-2 mm long, transparent and have an attached pappus 3-5 mm in length (Frankton and Mulligan 1987;Alex 1992).Conyza canadensis is a diploid species, with a chromosome number of 2n = 18 for Canadian and other specimens (Mulligan 1957; Federov 1969;Thebaud and Abbott 1995)....

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Section: Response To Herbicides and Other Chemicalsmentioning

confidence: 99%

Section: Response To Herbicides and Other Chemicalsmentioning

confidence: 99%

Section: Response To Herbicides and Other Chemicalsmentioning

confidence: 99%

Section: Growth and Developmentmentioning

confidence: 99%

See 2 more Smart Citations

The biology of Canadian weeds. 115. Conyza canadensis

Weaver¹

2001

Can. J. Plant Sci.

243

291

View full text Add to dashboard Cite

show abstract

“…Cela conduirait à la perte d'affinité de l'herbicide (Jursinic et Stemler, 1983). Enfin, le rôle de ce gène dans la résis-tance a été confirmé après avoir été introduit par génie génétique dans le génome nucléaire d'un Nicotiana chez lequel un effet de résistance à l'atrazine a été observé (Cheung et al, 1988 (Holt et al, 1981;Ireland et al, 1988;Ort et al, 1983;Ricroch et al, 1987 (Holt, 1990 (Harvey et Harper, 1982 (Pölos et al, 1988 (Morrisson et al, 1989).…”

Section: Introductionunclassified