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Imazethapyr persistence in sandy loam detected using white mustard bioassay

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2017
Authors
Jovanović-Radovanov, Katarina
article (publishedVersion)
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Abstract
Field experiments were conducted during two years at Srem region to investigate the influence of meteorological conditions, time and rate of application on soil persistence of imazethapyr in sandy loam type of soil. Imazethapyr was applied PRE- and POST-EM and in both cases in three application rates: 80, 120 and 160g a.i./ha. Soil samples were collected from the day of herbicide application in predetermined intervals up to one year after application and residual concentrations were determined with a white mustard root bioassay. Imazetapyr persistence was significantly influenced by meteorological conditions with average half-life being 6days longer in season with lower precipitation level. Time of application induced slower imazethapyr dissipation resulting in higher average t(1/2) (seven and nine days in first and second year of examination, respectively). Application rates had no consistent effect on imazethapyr persistence. Imazethapyr residue level one year after application cause...d no visible injuries on white mustard shoots, while root growth reduction ranged from 4.6 to 27.7%. Obtained residue levels were further compared with known data on crop sensitivity in order to assess possibility of crop injuries one year after imazethapyr application.

Keywords:
Imazethapyr / degradation / soil moisture / time of application / root bioassay
Source:
Journal of Environmental Science and Health Part B-Pesticides Food Contaminants and Agricultural Was, 2017, 52, 10, 711-718
Publisher:
  • Taylor & Francis Inc, Philadelphia
Funding / projects:
  • info:eu-repo/grantAgreement/MESTD/MPN2006-2010/20041/RS// (RS-20041)

DOI: 10.1080/03601234.2017.1356677

ISSN: 0360-1234

PubMed: 28934001

WoS: 000415993300001

Scopus: 2-s2.0-85029685057
[ Google Scholar ]
URI
http://aspace.agrif.bg.ac.rs/handle/123456789/4419
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Poljoprivredni fakultet

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