Characterization of clopyralid resistance in lawn burweed (Soliva sessilis).

Soliva sessilis is a troublesome annual weed species in New Zealand turfgrass. This weed has been controlled selectively in New Zealand turfgrass for many years using pyridine herbicides such as clopyralid. However, in some golf courses, the continuous application of pyridine herbicides has resulted...

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Autores principales:	Hossein Ghanizadeh, Fengshuo Li, Lulu He, Kerry C Harrington
Formato:	article
Lenguaje:	EN
Publicado:	Public Library of Science (PLoS) 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/c51ce4a7dd5340d99eaeaabd387f3332
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spelling	oai:doaj.org-article:c51ce4a7dd5340d99eaeaabd387f33322021-12-02T20:15:44ZCharacterization of clopyralid resistance in lawn burweed (Soliva sessilis).1932-620310.1371/journal.pone.0253934https://doaj.org/article/c51ce4a7dd5340d99eaeaabd387f33322021-01-01T00:00:00Zhttps://doi.org/10.1371/journal.pone.0253934https://doaj.org/toc/1932-6203Soliva sessilis is a troublesome annual weed species in New Zealand turfgrass. This weed has been controlled selectively in New Zealand turfgrass for many years using pyridine herbicides such as clopyralid. However, in some golf courses, the continuous application of pyridine herbicides has resulted in the selection of S. sessilis populations that are resistant to these herbicides. This study focuses on a clopyralid-resistant population of S. sessilis collected from a golf course with a long history of clopyralid applications. The resistant phenotype of S. sessilis was highly resistant to clopyralid (over 225-fold). It was also cross-resistant to dicamba, MCPA and picloram but not mecoprop. The level of resistance to dicamba was high (7-14-fold) but much lower (2-3-fold) for both MCPA and picloram. The phenotype was morphologically distinct from its susceptible counterpart. Individuals of the clopyralid-resistant phenotype had fewer lobes on their leaves and were slightly larger compared to the susceptible phenotype. Resistant individuals also had a larger leaf area and greater root dry weight than the susceptible plants. An evaluation of internal transcribed spacer (ITS) regions confirmed that clopyralid-resistant phenotypes are conspecific with S. sessilis. In summary, the cross-resistance to several auxinic herbicides in this S. sessilis phenotype greatly reduces chemical options for controlling it; thus, other integrated management practices may be needed such as using turfgrass competition to reduce weed germination. However, the morphological differences between resistant and susceptible plants make it easy to see, which will help with its management.Hossein GhanizadehFengshuo LiLulu HeKerry C HarringtonPublic Library of Science (PLoS)articleMedicineRScienceQENPLoS ONE, Vol 16, Iss 6, p e0253934 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Hossein Ghanizadeh Fengshuo Li Lulu He Kerry C Harrington Characterization of clopyralid resistance in lawn burweed (Soliva sessilis).
description	Soliva sessilis is a troublesome annual weed species in New Zealand turfgrass. This weed has been controlled selectively in New Zealand turfgrass for many years using pyridine herbicides such as clopyralid. However, in some golf courses, the continuous application of pyridine herbicides has resulted in the selection of S. sessilis populations that are resistant to these herbicides. This study focuses on a clopyralid-resistant population of S. sessilis collected from a golf course with a long history of clopyralid applications. The resistant phenotype of S. sessilis was highly resistant to clopyralid (over 225-fold). It was also cross-resistant to dicamba, MCPA and picloram but not mecoprop. The level of resistance to dicamba was high (7-14-fold) but much lower (2-3-fold) for both MCPA and picloram. The phenotype was morphologically distinct from its susceptible counterpart. Individuals of the clopyralid-resistant phenotype had fewer lobes on their leaves and were slightly larger compared to the susceptible phenotype. Resistant individuals also had a larger leaf area and greater root dry weight than the susceptible plants. An evaluation of internal transcribed spacer (ITS) regions confirmed that clopyralid-resistant phenotypes are conspecific with S. sessilis. In summary, the cross-resistance to several auxinic herbicides in this S. sessilis phenotype greatly reduces chemical options for controlling it; thus, other integrated management practices may be needed such as using turfgrass competition to reduce weed germination. However, the morphological differences between resistant and susceptible plants make it easy to see, which will help with its management.
format	article
author	Hossein Ghanizadeh Fengshuo Li Lulu He Kerry C Harrington
author_facet	Hossein Ghanizadeh Fengshuo Li Lulu He Kerry C Harrington
author_sort	Hossein Ghanizadeh
title	Characterization of clopyralid resistance in lawn burweed (Soliva sessilis).
title_short	Characterization of clopyralid resistance in lawn burweed (Soliva sessilis).
title_full	Characterization of clopyralid resistance in lawn burweed (Soliva sessilis).
title_fullStr	Characterization of clopyralid resistance in lawn burweed (Soliva sessilis).
title_full_unstemmed	Characterization of clopyralid resistance in lawn burweed (Soliva sessilis).
title_sort	characterization of clopyralid resistance in lawn burweed (soliva sessilis).
publisher	Public Library of Science (PLoS)
publishDate	2021
url	https://doaj.org/article/c51ce4a7dd5340d99eaeaabd387f3332
work_keys_str_mv	AT hosseinghanizadeh characterizationofclopyralidresistanceinlawnburweedsolivasessilis AT fengshuoli characterizationofclopyralidresistanceinlawnburweedsolivasessilis AT luluhe characterizationofclopyralidresistanceinlawnburweedsolivasessilis AT kerrycharrington characterizationofclopyralidresistanceinlawnburweedsolivasessilis
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Characterization of clopyralid resistance in lawn burweed (Soliva sessilis).

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