Today we just posted an extension bulletin to MSUweeds.com to help distinguish among the pigweed species currently found in Michigan. Species we currently have include:
- Powell amaranth
- Redroot pigweed
- Smooth pigweed
- Palmer amaranth
Some of these species in Michigan have been confirmed to be resistant to different herbicides (e.g. glyphosate and ALS inhibitors), so confirming the identity of your weed may be critical to the strategies needed for control.
Check out “Keys to distinguishing Palmer amaranth from other species” at MSUweeds.com.