Soybean Seeding Rate Effects on Weed Management
| Autor: | Robert G. Hartzler, Guillermo D. Arce, Palle Pedersen |
|---|---|
| Rok vydání: | 2009 |
| Předmět: |
0106 biological sciences
Pesticide resistance Population Plant Science Biology 01 natural sciences chemistry.chemical_compound parasitic diseases education education.field_of_study Crop yield fungi food and beverages 04 agricultural and veterinary sciences respiratory system Pesticide Weed control 010602 entomology chemistry Agronomy Glyphosate 040103 agronomy & agriculture 0401 agriculture forestry and fisheries Seeding Weed Agronomy and Crop Science |
| Zdroj: | Weed Technology. 23:17-22 |
| ISSN: | 1550-2740 0890-037X |
| Popis: | Studies were conducted in 2005 and 2006 at three Iowa locations to determine the effect of soybean seeding rate and glyphosate application timing on weed management and grain yields in glyphosate-resistant soybean. End-of-season weed populations were affected by soybean seeding rate at only one location, with higher weed densities present in the lowest seeding rate when glyphosate was applied at the V2 soybean growth stage. Although weed populations were not consistently affected by soybean population, weed biomass present at soybean harvest was inversely related to soybean population. At the location with the highest weed populations, no single glyphosate application provided yields equivalent to the weed-free control. At the other locations, glyphosate application timing did not affect soybean yield. Lower soybean yields occurred with 240,000 seed/ha compared with 420,000 seed/ha at all locations and with 300,000 seed/ha at two locations. Nomenclature: Glyphosate; soybean, Glycine max L. |
| Databáze: | OpenAIRE |
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