Results 131 to 140 of about 852 (177)

Imazethapyr bioactivity and movement in soil

Weed Science, 1998
A bioassay using red beet root length indicated an increase in imazethapyr bioactivity in Berryland sand (BLS) as soil pH increased from 3.7 to 6.5. Increasing pH above 6.5 had no effect on imazethapyr bioactivity. The lowest imazethapyr concentrations detected by the bioassay at pH 6.5 were 0.5, 1, 2.5, and 5 to 10 μg kg−1in acidwashed quartz sand ...
Scott W. Jourdan, Bradley A. Majek, Albert O. Ayeni   +2 more
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Performance of Imazethapyr on Pulse Crops

Weed Technology, 1990
The potential of imazethapyr as a selective herbicide in four pulse crops was investigated at Melfort, Saskatchewan in 1988 and 1989. Lentil, field pea, faba bean and annual vetch were tolerant to imazethapyr applied preemergence to a silty clay loam soil at 0.05, 0.10, 0.15, and 0.20 kg ai ha-1.
Najib Malik, Lawrence Townley-Smith
openaire   +1 more source

Biodegradation Characteristics of Imazaquin and Imazethapyr

Weed Science, 1989
The extent of14C-imazaquin and14C-imazethapyr abiotic vs. biotic degradation in soil was investigated. Degradation was measured in an in vitro system which allowed 90% recovery of applied herbicide. Triallate biodegradation is well documented and therefore used as a standard.
John R. Cantwell, Rex A. Liebl, Fred W. Slife   +2 more
openaire   +1 more source

Imazethapyr Efficacy with Adjuvants and Environments

Weed Technology, 1990
Adjuvant effectiveness with imazethapyr for kochia control was generally methylated seed oil ≥ nonionic surfactant ≥ petroleum oil in the greenhouse experiments, and methylated seed oil ≥ petroleum oil nonionic surfactant in the field. Oil adjuvants were applied at 2.3 L ha-1and nonionic surfactants were applied at 0.25% (v/v) of spray volume.
John D. Nalewaja, Jerzy Palczynski, Frank A. Manthey   +2 more
openaire   +1 more source

Effect of Imazethapyr on Perennial Grasses

Weed Technology, 1995
Experiments were conducted near Scottsbluff, NE in 1991 and 1992 to evaluate the selectivity of imazethapyr for weed control in blue grama, intermediate wheatgrass, little bluestem, Russian wildrye, switchgrass, and western wheatgrass. Imazethapyr reduced weed biomass in all seedings and injured all perennial grasses 12 days after treatment (DAT ...
openaire   +1 more source

Transport of Imazethapyr in Undisturbed Soil Columns

Soil Science Society of America Journal, 1992
Abstract The disappearance of imazethapyr [(±)‐2‐[4,5‐dihydro‐4‐methyl‐4‐(1‐methylethyl)‐5‐oxo‐1H‐imidazole‐2‐yl]‐5‐ethyl‐3‐pyridinecarboxylic acid] from soil solution was investigated to evaluate the transport of imazethapyr in undisturbed soil columns.
J. David O'Dell, Jeff D. Wolt, Philip M. Jardine   +2 more
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Maize cultivars differ in tolerance to imazethapyr

South African Journal of Plant and Soil, 2000
The low tolerance of maize (Zea mays L.) to imazethapyr ((±)-2-[4,5-dihydro-4 methyl-4-(1 -methylethyl)-5-oxo 1H-imidazol-2-yl]-5-ethyl-3-pyridinecarboxylic acid) resulted in extensive crop damage in 1992/93 due to residue carry-over from resistant soybean (Glycine max L.).
L. J. van Wyk, C. F. Reinhardt
openaire   +1 more source

Spatial variability of imazethapyr sorption in soil

Weed Science, 1999
A significant limitation in using sorption coefficients (Kd) to predict solute transport through natural soils is the spatial variability of soil properties over large field areas. Spatial variability inKdfor imazethapyr was determined on representative samples from a 31.4-ha field, covering a pH range from 4.9 to 7.6 and an organic carbon (OC) range ...
Rubem S. Oliveira, William C. Koskinen, Francisco A. Ferreira, Bhairav R. Khakural, David J. Mulla, Pierre J. Robert   +5 more
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Weed Control in Sericea Lespedeza with Imazethapyr

Weed Technology, 2005
Field studies were conducted to determine the feasibility of using imazethapyr applied preemergence (PRE) and postemergence (POST) for weed control in sericea lespedeza. In the POST experiment, imazethapyr was applied at 0, 71, 142, and 213 g ai/ha to mature, recently mowed stands of sericea lespedeza.
Glenn Wehtje, Jorge A. Mosjidis
openaire   +1 more source

Time-dependent adsorption of imazethapyr to soil

Weed Science, 2000
Abstract Time-dependent adsorption of imazethapyr was studied in the laboratory on a sandy loam soil at 16% moisture for 30 d. Soil pH was adjusted to 4.5 to 6.8. Concentration of imazethapyr in soil water declined rapidly within the first day of incubation for all soil pH levels, indicating rapid initial adsorption.
David H. Johnson, Dale L. Shaner, James Deane, Lorraine A. Mackersie, Gary Tuxhorn   +4 more
openaire   +1 more source