Weedy Amaranthus Quiz II

June 21, 2017 12:33 PM
Blog Post

The six weedy Amaranthus species at the weed garden have grown quite a bit, but I'm not sure how much easier it is to differentiate a few of the species. The six pigweeds are Palmer, Powell's and spiny amaranth, waterhemp, and redroot and tumble pigweed (not in that order!!). The purpose of this exercise is to demonstrate how easy it would be to overlook Palmer amaranth in fields if time isn't taken to make sure exactly what Amaranthus you're dealing with. Scroll to the bottom to find the answers.

Amaranthus 1
Amaranthus 2
Amaranthus 3
Amaranthus 4
Amaranthus 5
Amaranthus 6


Answer key:

#1 - Spiny Amaranth

#2 - Palmar Amaranth

#3 - Powell’s Amaranth

#4 - Redroot Pigweed

#5 - Tumble Pigweed

#6 - Waterhemp


Bob Hartzler Professor of Agronomy

Dr. Bob Hartzler is a professor of agronomy and an extension weed specialist. He conducts research on weed biology and how it impacts the efficacy of weed management programs in corn and soybean. Dr. Hartzler also teaches undergraduate classes in weed science and weed identificatio...