re: Torpedo Grass - Any hope, or should I concrete the lawn?

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Torpedo Grass

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Another well-intentioned, but terribly misguided non-native species introduced into the country.

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Native to Africa and Asia, Torpedo Grass was introduced to the United States around 1876, primarily through seed used for forage crops. The real infestation came in the early part of the 20th century when the USDA imported and distributed seed for planting pastures as forage for cattle. It proved to be inferior for use as a forage crop. Now it is found in the Gulf South from Florida to Texas and in other coastal areas around the world.

Torpedo grass is nearly impossible to completely eliminate, so management of it is not a matter of how to get rid of it completely but instead how to prevent it from taking over an area. The only way that this can be accomplished is with repeated and frequent efforts. You will have to scout regularly and any time torpedo grass is seen, promptly take action.  Prevention of torpedo grass centers on removal of the entire plant, as the plant can regrow from fragments left behind in the soil.  There are few control options for torpedo grass.  Options will depend on its location and surrounding vegetation.

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Nasty stuff.