Palmer amaranth and waterhemp, both pigweed species, are often cited as driver weeds in the U.S. because of their prolific seed production, competitiveness with crops, genetic diversity and ...

Hatchlings are about an inch and a half in carapace length. Spiny softshells have a wide distribution in North America, extending nearly continuously west to east from Oklahoma through western New ...

“If we find pigweed seed we just have to assume it is Palmer amaranth even if we don’t know,” he says. “If a grower sends us something with pigweed, we reject it.” Right now it’s hard ...