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Need help with weed identification. I have tried weed killer like Scott’s weed and doesn’t work

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  • Is this from your lawn or the borders/beds? – Bamboo May 3 at 12:44
  • It looks like a grass species, so broad-leaf weedkillers including "lawn weedkillers" won't affect it. Hard to tell the exact species from your picture. – alephzero May 3 at 13:26
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    Definitely a grass. I advise trying to find an online grass identification tool for your area. I have had great success with this method. Sadly, if it is quackgrass, I am not sure if any selective herbicide is available. – Evil Elf May 3 at 13:27
  • It looks more like barley than couch grass to me. It could have acquired herbicide resistance from a domesticated variety. Are you near farmland? – Separatrix May 3 at 15:14
  • @Separatrix Barley is a species of grass, so it has the same natural resistance to broad leaf weed killers as any other type of grass. There are several "wild" species of barley as well as the cultivated varieties (which have been genetically modified by humans for about 4,000 years before Monsanto got a bad reputation for doing it!). – alephzero May 3 at 18:24
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Dig it up and either re-seed or fill the hole with a piece of turf. This is the message behind the previous comments and it's what I do when I get it.

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