Palmer amaranth control, fecundity, and seed viability from soybean herbicides applied at first female inflorescence
| Autor: | Eric Scruggs, Mark J. VanGessel, David L. Holshouser, Michael L. Flessner |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
0106 biological sciences
Amaranth glufosinate Plant Science 2 4-D Biology 01 natural sciences dicamba Crop chemistry.chemical_compound Agricultural experiment station glyphosate Palmer amaranth Dicamba auxin herbicides business.industry crop topping 04 agricultural and veterinary sciences Herbicide resistance 010602 entomology Glufosinate chemistry Agronomy Inflorescence Agriculture seed production Glyphosate Amaranthus palmeri S Watson AMAPA 040103 agronomy & agriculture 0401 agriculture forestry and fisheries soybean Glycine max (L) Merr business Agronomy and Crop Science |
| Zdroj: | Weed Technology. 35:426-432 |
| ISSN: | 1550-2740 0890-037X |
| Popis: | Palmer amaranth is an extremely troublesome weed for soybean growers because of its aggressive growth, adaptability, prolific seed production, and widespread resistance to many herbicides. Studies were initiated to determine the effects of herbicide application at first female inflorescence on Palmer amaranth control, biomass, seed production, cumulative germination, and seed viability. Enlist (2,4-D-resistant) soybean and Xtend (dicamba-resistant) soybean were planted and various combinations of either 2,4-D or dicamba with and without glufosinate and/or glyphosate were applied at first visible female Palmer amaranth inflorescence. Mixtures of 2,4-D + glufosinate and 2,4-D + glufosinate + glyphosate provided the greatest control at 4 wk after treatment in Enlist soybean. Similarly, in Xtend soybean, combinations of dicamba + glufosinate and dicamba + glufosinate + glyphosate provided the greatest control. The greatest reductions in biomass were from combinations of auxin herbicides (2,4-D or dicamba) plus glufosinate with and without glyphosate. Seed production was reduced most by treatments containing at least one effective site of action: an auxin herbicide (2,4-D or dicamba) or glufosinate. In contrast to previous research, cumulative germination and seed viability were not affected by herbicide treatments. This research indicates the efficacy of auxin herbicides or glufosinate alone and in combination to reduce the seed production of Palmer amaranth when applied at first female inflorescence. More research is needed to evaluate the full potential for applications of these herbicides at flower initiation to mitigate the evolution of herbicide resistance. Bayer Crop ScienceBayer AG; Virginia Soybean Board; Virginia Agricultural Experiment Station; National Institute of Food and Agriculture, US Department of AgricultureUnited States Department of Agriculture (USDA) Published version The authors acknowledge Wykle Greene, Shawn Beam, Kara Pittman, Kevin Bamber, and Spencer Michael of Virginia Tech for their help with this research; and Bayer Crop Science, the Virginia Soybean Board, the Virginia Agricultural Experiment Station, and the Hatch Program of the National Institute of Food and Agriculture, US Department of Agriculture, for providing partial funding for this research. Although no specific funding was received related to this manuscript from manufacturers Corteva Agriscience or United Phosphorus, funding has been provided to Virginia Tech in support of M.L.F.'s research and extension program. |
| Databáze: | OpenAIRE |
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