International Survey of Herbicide-Resistant Weeds

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Status of Herbicide Resistance in Portugal - Isabel Calha : January, 2014

In Portugal the most serious problems with herbicide resistance are the recent cases of glyphosate resistance in perennial crops.

Herbicide Resistant Weeds in Portugal
Herbicide Resistant Weeds in Portugal
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Herbicide Resistant Weeds in Portugal
#SpeciesCommon NameFirst YearSite of Action
1 Alisma plantago-aquaticaCommon WaterplantainPortugal 199534 Inhibition of Acetolactate Synthase (B/2)
169
2 Chenopodium albumCommon LambsquartersPortugal 200334 PSII inhibitors - Serine 264 Binders (C1 C2/5)
5227
3 Conyza bonariensisHairy FleabanePortugal 201034 Inhibition of Enolpyruvyl Shikimate Phosphate Synthase (G/9)
5539
4 Conyza canadensisHorseweedPortugal 201134 Inhibition of Enolpyruvyl Shikimate Phosphate Synthase (G/9)
7824
5 Lolium perennePerennial RyegrassPortugal 201334 Inhibition of Enolpyruvyl Shikimate Phosphate Synthase (G/9)
7825
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Cite this site as: Heap, I.  The International Survey of Herbicide Resistant Weeds.  Online.  Internet.  Monday, October 18, 2021 .  Available  www.weedscience.org
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