Ozone reduces crop yields and alters competition with weeds such as yellow nutsedge

Ozone reduces crop yields and alters competition with weeds such as yellow nutsedge

In recent decades, air quality has improved near most cities but not in rural areas such as the San Joaquin Valley. Many studies using diverse exposure techniques have shown that ground-level ozone air pollution reduces plant growth and yield, from negligible impacts in some species to over 30% loss...

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Bibliographic Details
Main Authors: David A Grantz, Anil Shrestha
Format: Article
Language:English
Published: University of California Agriculture and Natural Resources 2005-04-01
Series:California Agriculture
Online Access:http://calag.ucanr.edu/archive/?article=ca.v059n02p137
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spelling doaj-cea8a1f85fb54d3ab6ce4a70719fa8af2020-11-24T21:21:44ZengUniversity of California Agriculture and Natural ResourcesCalifornia Agriculture0008-08452160-80912005-04-0159213714310.3733/ca.v059n02p13710.3733/cav059n02_18Ozone reduces crop yields and alters competition with weeds such as yellow nutsedgeDavid A Grantz0Anil Shrestha1D.A. Grantz is Director, UC Kearney Agricultural Center, and Air Pollution Effects Specialist and Plant Physiologist, Department of Botany and Plant Sciences and the Air Pollution Research Center, UC RiversideA. Shrestha is Integrated Pest Management Weed Ecologist, UC Statewide IPM Program. Both are located at the UC Kearney Research and Extension Center, Parlier. We gratefully acknowledge support from the USDA National Research Initiative through award 00–35100-9181.In recent decades, air quality has improved near most cities but not in rural areas such as the San Joaquin Valley. Many studies using diverse exposure techniques have shown that ground-level ozone air pollution reduces plant growth and yield, from negligible impacts in some species to over 30% losses in others. We studied the interaction of ozone with weed competition from yellow nutsedge in Pima cotton and tomato in open-top field-exposure chambers at the UC Kearney Research and Extension Center in Fresno County. Ozone impacts on cotton (which is relatively sensitive) were compounded by weed competition, whereas tomato (which is less sensitive) competed well at all ozone concentrations. Our data suggests that crop-loss estimates obtained in single-factor experiments accurately reflect the serious risk of ozone to agriculture, but that more accurate yield predictions will require the consideration of interactions between the components of complex crop production systems, including weed competition.http://calag.ucanr.edu/archive/?article=ca.v059n02p137
collection DOAJ
language English
format Article
sources DOAJ
author David A Grantz
Anil Shrestha
spellingShingle David A Grantz
Anil Shrestha
Ozone reduces crop yields and alters competition with weeds such as yellow nutsedge
California Agriculture
author_facet David A Grantz
Anil Shrestha
author_sort David A Grantz
title Ozone reduces crop yields and alters competition with weeds such as yellow nutsedge
title_short Ozone reduces crop yields and alters competition with weeds such as yellow nutsedge
title_full Ozone reduces crop yields and alters competition with weeds such as yellow nutsedge
title_fullStr Ozone reduces crop yields and alters competition with weeds such as yellow nutsedge
title_full_unstemmed Ozone reduces crop yields and alters competition with weeds such as yellow nutsedge
title_sort ozone reduces crop yields and alters competition with weeds such as yellow nutsedge
publisher University of California Agriculture and Natural Resources
series California Agriculture
issn 0008-0845
2160-8091
publishDate 2005-04-01
description In recent decades, air quality has improved near most cities but not in rural areas such as the San Joaquin Valley. Many studies using diverse exposure techniques have shown that ground-level ozone air pollution reduces plant growth and yield, from negligible impacts in some species to over 30% losses in others. We studied the interaction of ozone with weed competition from yellow nutsedge in Pima cotton and tomato in open-top field-exposure chambers at the UC Kearney Research and Extension Center in Fresno County. Ozone impacts on cotton (which is relatively sensitive) were compounded by weed competition, whereas tomato (which is less sensitive) competed well at all ozone concentrations. Our data suggests that crop-loss estimates obtained in single-factor experiments accurately reflect the serious risk of ozone to agriculture, but that more accurate yield predictions will require the consideration of interactions between the components of complex crop production systems, including weed competition.
url http://calag.ucanr.edu/archive/?article=ca.v059n02p137
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AT anilshrestha ozonereducescropyieldsandalterscompetitionwithweedssuchasyellownutsedge
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