Two Purdue Extension specialists have developed an information
guide to help crop producers across Indiana deal with Palmer
amaranth, an aggressive, herbicide-resistant weed. Weed
scientists Bill Johnson and Travis Legleiter released a new
publication, Palmer Amaranth Biology, Identification and
Management in Indiana, to help farmers control the weed’s
spread. “Our publication gives producers a broad view of the
weed, and it gives them a starting point to build a preventative
program,” Legleiter said. “We’re letting producers know that if
they do encounter the weed, they need to have a proactive plan.”
The publication can be found online at https://ag.purdue.edu/btn
y/weedscience/Documents/Palmer_Bio_Id_Mngmt_pg.pdf Most
populations of Palmer amaranth are resistant to glyphosate,
making it very hard to control. The weed has infested cotton and
soybean farms in the southern United States in recent years,
causing economic hardships for farmers. Johnson said Palmer
amaranth populations were confirmed in the Evans