pigweed infestations

What Will Kill Pigweed? A ready-to-use, glyphosate-based herbicide kills most pigweed plants. Spray all the plant surfaces until wet, and target pigweeds precisely. Glyphosate will kill other plants it contacts. How do you kill pigweed without killing grass? Using non-selective herbicides containing the chemicals glyphosate or glufosinate-ammonium works well. They may only be used in