| Common milkweed and Hemp dogbane | Corn | 2,4-D ester (0.5-0.75 pt/A) or 2,4-D amine (1-1.5 pt/A) | Apply postemergence. Use drop nozzles when corn is taller than 8". |
| | | 2,4-D amine (1 - 2 pt/A) or ester (1 - 2 pt/A) | Apply mid- to late-season after corn silks have turned brown and plants are actively growing and have adequate foliage. |
| | | Banvel/Clarity (0.5 to 1 pt/A) | See Canada thistle comments |
| | | Beacon (0.38 oz/A)+ 2,4-D or Banvel or Exceed 0.88 oz/a + 2,4-D or Banvel | Apply postemergence to corn and to small milkweed/hemp dogbane plants. See label for corn height. |
| | Corn/Soybeans | glyhosate 33% solution (dependent on product) | Apply with wiper applicator (rope-wick or sponge) only when there is a sufficient height differential between weed and crop. |
| | | glyphosate 1-2% solution (dependent on product) | Spot treat plants that are actively growing. Will kill crop where treated if not glyphosate tolerant. |
| | STS Soybean | Synchrony STS (0.85 oz/A) | For shoot suppression of common milkweed. Use only on STS soybean varieties. See label for rate of adjuvant. |
| | Roundup Ready corn | glyphosate (0.75 lb ae/A) | Will control or suppress the weed. Repeat application may be required. Applications in bloom stage will provide the most consistent control. Do not exceed 1.5 lb ae/A in-crop applications. Application must be made before RR corn is V8 (30" tall). |
| | Roundup Ready Soybean | glyphosate (1.1-1.5 lb ae/A) | Will control or suppress the weed. Repeat application may be required. Applications in bloom stage will provide the most consistent control. Do not exceed 2.25 lb ae/A in-crop applications. |
Hemp dogbane problem, tillage to get rid of it?
