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Killzall Weed and Grass Killer - 41% Glyphosate 
Edgar from Foley, Alabama writes,

What is the best product to kill Cogon grass?


Because cogongrass is such a difficult weed to eliminate, we would recommend using a glyphosate product, such as Killzall Weed and Grass Killer. Be sure to be careful when using this product because it will kill whatever it roaches. Use 2.5 oz. per gallon of water. Apply to actively growing weeds, preferably before the seed heads form. Completely spray the foliage of target plants until thoroughly wet. Warm sunny weather accelerates weed control. If desirable plants are accidentally sprayed, immediately wash them with clean water.

Answer last updated on: 04/27/2015

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