Results 171 to 180 of about 1,434 (196)

Improved method for the analysis of imazapyr in soil

Pest Management Science, 1995
AbstractA method for the analysis of imazapyr [2‐(4‐isopropyl‐4‐methyl‐5‐oxo‐2‐imidazolin‐2‐yl)nicotinic acid] residues in tropical and temperate soils was developed. Imazapyr residues, extracted from soil with ammonium hydrogen carbonate and cleaned‐up by centrifuging, anion‐exchange solid‐phase extraction (SPE), pH adjustment, and C18 SPE, were ...
Charles S. Helling, Michael A. Doherty
exaly   +2 more sources

Crop Responses to Hexazinone, Imazapyr, Tebuthiuron, and Triclopyr

Weed Technology, 1993
Field investigations were conducted for 2 yr to characterize the responses of wheat, kidney bean, field corn, squash, okra, potato, and banana to soil-applied hexazinone, imazapyr, tebuthiuron, and triclopyr at rates used for control of woody perennial plants.
C. Benjamin Coffman, J. Ray Frank, William E. Potts   +2 more
openaire   +1 more source

Adsorption of the herbicides imazapyr, emazethapyr and imazaquin on soils and humic acids

Journal of Environmental Science and Health - Part B Pesticides, Food Contaminants, and Agricultural Wastes, 1998
Abstract Adsorption of the imidazolinone herbicides imazapyr, imazethapyr and imazaquin have been studied on two humic acids and on ten soils. On humic acids, adsorption was promoted by low pH values and was in the order imazapyr < imazethapyr < imazaquin corresponding to the increasing lipophilicity of the molecules, in agreement with the octanol ...
M Gennari
exaly   +3 more sources

Sorption of imazapic and imazapyr herbicides on chitosan-modified biochars

International Journal of Environmental Science and Technology, 2020
This study aimed to synthesize chitosan-modified biochars with the objective of producing an efficient biosorbents for immobilization of imazapic and imazapyr herbicides in soil. Two biochars were produced separately from oil palm empty fruit bunches and rice husk biomasses and then modified with chitosan in a nitrogen gas environment.
S. Yavari, M. Abualqumboz, N. Sapari, H.-A. Hata-Suhaimi, N.-Z. Nik-Fuaad, S. Yavari   +5 more
openaire   +1 more source

Study on the behaviour of imazapyr in two Moroccan soils

Weed Research, 1998
Imazapyr owes its importance in Morocco to its success in controlling the perennial weed Solanumelaeagnifolium Cav., which infests the Tadla area. Persistence and mobility of imazapyr has been studied in two Moroccan soils from the Rabat area, with differing organic matter content (red and organic soils), under laboratory conditions at 75% of their ...
M. EL AZZOUZI, null DAHCHOUR, null BOUHAOUSS, null FERHAT   +3 more
openaire   +1 more source

NIR spectroscopy to identify and quantify imazapyr in soil

Analytical Methods, 2012
The analysis of herbicide residues applied to the soil is commonly conducted by using chromatographic techniques which use organic solvents, are costly and time consuming. Having a simple and inexpensive discriminant method to determine samples with and without herbicide residues would be highly beneficial to lower costs of analysis and save time.
Milton Soto-Barajas, Inmaculada González-Martin, José Miguel Hernández-Hierro, B. Prado, Claudia Hidalgo, Jorge Etchevers   +5 more
openaire   +1 more source

CORRELATION OF IMAZAPYR ADSORPTION AND DESORPTION WITH SOIL PROPERTIES

Soil Science, 1999
Adsorption and desorption of imazapyr on eight soils were examined using a batch equilibration technique. Equilibrium was able to be reached within 20 h of shaking time. The adsorbed percent increased both with the increase in bath temperature and the decrease in soil pH. The adsorption and desorption isotherms fit the Freundlich equation well.
Qiquan Wang, Weiping Liu
openaire   +1 more source

Kinetic studies of imazapyr photolysis and characterization of the main photoproducts

Toxicological and Environmental Chemistry, 2004
The fate of imazapyr (2-(4-isopropyl-4-methyl-5-oxo-2-imidazolin-2-yl)nicotinic acid), a broad-spectrum herbicide in the imidazolinone family, has been studied upon UV irradiation. Most of the photoproducts occurring during the photodegradation have been characterized by means of liquid chromatography and mass spectrometry coupled techniques (LC-MS ...
Etienne Quivet
exaly   +2 more sources

Response of food and forage crops to soil-applied imazapyr

Weed Science, 1998
Greenhouse experiments were conducted to determine the persistence of imazapyr and the tolerance of a wide variety of bioassay plants to imazapyr residues in central Texas soils. Eleven bioassay crops were planted in pots 1 d before and 2, 6, and 12 mo after imazapyr application at rates of 0, 0.02, 0.04, 0.07, 0.14, 0.28, 0.56, and 1.12 kg ai ha−1 ...
Rodney W. Bovey, Scott A. Senseman
openaire   +1 more source

Sorption and Mobility of Sulfometuron and Imazapyr in Five Alabama Soils

Weed Science, 1987
Mobility and sorption of radiolabeled sulfometuron {2-[[[[(4,6-dimethyl-2-pyrimidinyl)amino] carbonyl] amino] sulfonyl] benzoic acid} and imazapyr {(±)-2-[4,5-dihydro-4-methyl-4-(1-methylethyl)-5-oxo-1H-imidazol-2-yl]-3-pyridinecarboxylic acid} were evaluated in five soils representative of the major soil types in Alabama.
Glenn Wehtje, Ray Dickens, John W. Wilcut, Ben F. Hajek   +3 more
openaire   +1 more source