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Tiered aquatic risk refinement: Case study—at‐plant applications of granular chlorpyrifos to corn

Identifieur interne : 000819 ( Istex/Corpus ); précédent : 000818; suivant : 000820

Tiered aquatic risk refinement: Case study—at‐plant applications of granular chlorpyrifos to corn

Auteurs : Patrick L. Havens ; Steven A. Cryer ; Laurie J. Rolston

Source :

RBID : ISTEX:6B2639654BEB6B20F0B4EB508445E0E41B54E3A0

English descriptors

Abstract

The tools of risk assessment are important in the management of environmental risk from the use of agricultural chemicals. A tiered process of estimating and refining the risks from runoff to nontarget aquatic ecosystem is described. The methodology uses screening tools at the lower level of assessment and progresses to a probabilistic, geographically specific tool at the highest tier level. The tools are demonstrated by an analysis of the risks to aquatic ecosystems resulting from the use of granular chlorpyrifos on corn. Vegetative filter strips and reduced tillage were examined as potential best management practices to reduce runoff impact. In addition, data from outdoor microcosm experiments were used to refine toxicity endpoints. The combination of runoff reduction and endpoint refinement resulted in a two‐ to 16‐fold reduction in potential risk, based on 90th percentile endpoints. The results also located where more localized efforts in product stewardship, user education, potential field research, or more refined assessment may be beneficial. The simulation results are compared to field monitoring results.

Url:
DOI: 10.1002/etc.5620170716

Links to Exploration step

ISTEX:6B2639654BEB6B20F0B4EB508445E0E41B54E3A0

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<dateCaptured encoding="w3cdtf">1997-04-04</dateCaptured>
<dateValid encoding="w3cdtf">1997-10-20</dateValid>
<copyrightDate encoding="w3cdtf">1998</copyrightDate>
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<languageTerm type="code" authority="iso639-2b">eng</languageTerm>
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<extent unit="figures">6</extent>
<extent unit="tables">2</extent>
<extent unit="references">53</extent>
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<abstract lang="en">The tools of risk assessment are important in the management of environmental risk from the use of agricultural chemicals. A tiered process of estimating and refining the risks from runoff to nontarget aquatic ecosystem is described. The methodology uses screening tools at the lower level of assessment and progresses to a probabilistic, geographically specific tool at the highest tier level. The tools are demonstrated by an analysis of the risks to aquatic ecosystems resulting from the use of granular chlorpyrifos on corn. Vegetative filter strips and reduced tillage were examined as potential best management practices to reduce runoff impact. In addition, data from outdoor microcosm experiments were used to refine toxicity endpoints. The combination of runoff reduction and endpoint refinement resulted in a two‐ to 16‐fold reduction in potential risk, based on 90th percentile endpoints. The results also located where more localized efforts in product stewardship, user education, potential field research, or more refined assessment may be beneficial. The simulation results are compared to field monitoring results.</abstract>
<subject lang="en">
<genre>keywords</genre>
<topic>Environmental risk assessment</topic>
<topic>Surface water</topic>
<topic>Best management practices</topic>
<topic>Chlorpyrifos</topic>
</subject>
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<titleInfo>
<title>Environmental Toxicology and Chemistry</title>
<subTitle>An International Journal</subTitle>
</titleInfo>
<titleInfo type="abbreviated">
<title>Environmental Toxicology and Chemistry</title>
</titleInfo>
<genre type="journal">journal</genre>
<subject>
<genre>article-category</genre>
<topic>Environmental Toxicology</topic>
</subject>
<identifier type="ISSN">0730-7268</identifier>
<identifier type="eISSN">1552-8618</identifier>
<identifier type="DOI">10.1002/(ISSN)1552-8618</identifier>
<identifier type="PublisherID">ETC</identifier>
<part>
<date>1998</date>
<detail type="volume">
<caption>vol.</caption>
<number>17</number>
</detail>
<detail type="issue">
<caption>no.</caption>
<number>7</number>
</detail>
<extent unit="pages">
<start>1313</start>
<end>1322</end>
<total>10</total>
</extent>
</part>
</relatedItem>
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<identifier type="DOI">10.1002/etc.5620170716</identifier>
<identifier type="ArticleID">ETC5620170716</identifier>
<accessCondition type="use and reproduction" contentType="copyright">Copyright © 1998 SETAC</accessCondition>
<recordInfo>
<recordContentSource>WILEY</recordContentSource>
<recordOrigin>Wiley Periodicals, Inc.</recordOrigin>
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