Palmer amaranth (Amaranthus palmeri S. Watson), morningglory (Ipomoea spp.), sicklepod (Senna obtusifolia L.), and large crabgrass (Digitaria sanguinalis L.) are among the most troublesome weeds ...

Three cows recovered; 1 died. Differential diagnoses considered were hypocalcemia, hypomagnesemia, rabies and toxicoses from Amaranthus retroflexus (pigweed), Quercus spp (oak), Cassia spp (senna ...

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 ...

“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 ...