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The effect of light environment during tillage on the recruitment of various summer annuals

Published online by Cambridge University Press:  12 June 2017

Robert S. Gallagher  and
John Cardina
John Cardina
Affiliation:
Department of Horticulture and Crop Science, Ohio Agricultural Research and Development Center, Ohio State University, Wooster, OH 44691
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Abstract

Weed seeds can require an exposure to light for induction of germination. Conducting tillage operations at night and thus preventing the photoinduction of germination has been proposed as a means to reduce weed emergence in agricultural systems. This research was conducted to evaluate night tillage as a weed management option and to determine which tillage operations have the greatest effect on light-mediated recruitment. Weed emergence was evaluated after conducting factorial combinations of day and night moldboard plowing and disking in the springtime from 1992 through 1995. The light environment during disking generally had a slightly greater effect on emergence than the light environment during plowing. Emergence of pigweed species and giant foxtail was, at most, 30 to 55% higher following day vs. night disking. Emergence of other weeds was not affected by the light environment during tillage. We conclude that night tillage may not be a viable approach to weed management due to insufficient reductions in weed emergence associated with night tillage and the high degree of variability in the recruitment response to light conditions during tillage.

Keywords

Giant foxtail, Setaria faberi Herrm. SETFAcommon lambsquarters, Chenopodium album L. CHEALcommon purslane, Portulaca oleracea L. POROLredroot pigweed, Amarantbus retrofexus L. AMAREsmooth pigweed, Amaranthus hybridus L. AMACHcommon ragweed, Ambrosia artemisiifolia L. AMBELTillageweed controlphytochromelightgerminationrecruitmentSETFACHEALPOROLAMAREAMACHAMBEL
Type
Weed Management
Information
Weed Science , Volume 46 , Issue 2 , April 1998 , pp. 214 - 216
Copyright
Copyright © 1998 by the Weed Science Society of America 

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