Influence of Surfactants and Ammonium Sulfate on Glyphosate Phytotoxicity to Quackgrass (Elytrigia repens)
| Autor: | E. Meinen, H. de Ruiter, A.J.M. Uffing |
|---|---|
| Rok vydání: | 1996 |
| Předmět: |
0106 biological sciences
Ammonium sulfate Salt (chemistry) Plant Science 01 natural sciences chemistry.chemical_compound Pulmonary surfactant AGRRE Reinfestation quackgrass Adjuvants Isopropylamine chemistry.chemical_classification Research Institute for Agrobiology and Soil Fertility Instituut voor Agrobiologisch en Bodemvruchtbaarheidsonderzoek 04 agricultural and veterinary sciences Phytopharmacology 010602 entomology chemistry Agronomy Glyphosate 040103 agronomy & agriculture 0401 agriculture forestry and fisheries Phytotoxicity Weed Agronomy and Crop Science Nuclear chemistry |
| Zdroj: | Weed Technology 10 (1996) 4 |
| ISSN: | 1550-2740 0890-037X |
| DOI: | 10.1017/s0890037x00040835 |
| Popis: | Field and greenhouse experiments were conducted to investigate the influence of two cationic alkylamine surfactants, three nonionic surfactants, and ammonium sulfate on the performance of glyphosate (isopropylamine salt) against quackgrass. In the field experiments, the reinfestation of quackgrass in the year after treatment was zero or negligible in all plots that received the recommended rate of glyphosate (1.44 kg ae/ha). At one-fourth of the recommended rate (0.36 kg ae/ha) the glyphosate-adjuvant combinations also severely inhibited the reinfestation of quackgrass. At the low herbicide rate and without ammonium sulfate, lipophilic surfactants were less effective than more hydrophilic surfactants. In the greenhouse experiments, the glyphosate doses giving 50% response (ED 50 ) were determined. Ranking of the surfactants according to the ED 50 for glyphosate demonstrated a similar result to that observed in the field experiment. Ammonium sulfate added to the glyphosate-surfactant combinations reduced the ED 50 for glyphosate 5-fold. The field and greenhouse experiments demonstrated that two hydrophilic nonionic surfactants enhance glyphosate efficacy against quackgrass to the same extent as the hydrophilic cationic tallowamine surfactant. These two nonionic surfactants have a relatively low toxicity to non-target organisms and may substitute the more toxic alkylamine surfactants. Nomenclature : Glyphosate, N-(phosphonomethyl)glycine; quackgrass, Elytrigia repens L. (Nevski) # 3 AGRRE. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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