Figure 1. Petiole length of Palmer amaranth (right) is much longer than the petiole of waterhemp (left).
In an effort to improve local weed management and educational efforts, Nebraska Extension would like to determine the distribution of Palmer amaranth across Nebraska counties and assess those populations for potential multiple-resistance to various herbicide site of action groups. Therefore, we are asking producers, agronomists, USDA staff, university faculty, and others with a knowledge of local weeds to complete the following short (less than 5 minutes) survey by September 9: Palmer amaranth distribution and potential resistance survey. The survey is mobile-friendly (smart phone, tablet).
Palmer amaranth can be one of the most problematic weeds in Nebraska cropping systems. Even though Palmer amaranth has been present in Nebraska for several decades, it has been spreading to new areas across Nebraska. Sometimes Palmer amaranth is misidentified as common waterhemp, so there is a link in the survey explaining how to tell the difference between the two pigweed species. Additionally, multiple-resistance has been confirmed in Palmer amaranth in a Nebraska seed-corn field.
Thank you for helping us gain a better understanding of Palmer amaranth distribution and potential herbicide resistance in Nebraska!
