The six Palmer amaranth biotypes reduced soybean height similarly in the greenhouse but did not affect soybean height in the field. A field experiment over 2 years compared season-long interference of these biotypes in soybean. Early season interference in soybean for 40 days after emergence by three glyphosate-resistant (GR and three glyphosate-susceptible (GS Palmer amaranth biotypes from Georgia and North Carolina was compared in the greenhouse. has become difficult to control in row crops due to selection for biotypes that are no longer controlled by acetolactate synthase inhibiting herbicides and/or glyphosate. Interference of Selected Palmer Amaranth (Amaranthus palmeri Biotypes in Soybean (Glycine maxĭirectory of Open Access Journals (Sweden)įull Text Available Palmer amaranth (Amaranthus palmeri S. The Palmer Drought Severity Index (PDSI) is devised by Palmer (1965) to represent the severity of dry and wet spells over the U.S. National Oceanic and Atmospheric Administration, Department of Commerce — PDSI from the Dai dataset.
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