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Safety of Bicyclopyrone on Several Vegetable Crops and Efficacy of Weed Control

Published online by Cambridge University Press:  21 June 2018

Yin Chen ,
Chengsong Hu  and
Douglas Doohan
Yin Chen
Affiliation:
Graduate Student, Department of Horticulture and Crop Science, The Ohio State University, Wooster, OH, USA
Chengsong Hu
Affiliation:
Research Associate, Department of Horticulture and Crop Science, The Ohio State University, Wooster, OH, USA
Douglas Doohan*
Affiliation:
Professor, Department of Horticulture and Crop Science, The Ohio State University, Wooster, OH, USA
*
Author for correspondence: Douglas Doohan, Department of Horticulture and Crop Science, The Ohio State University, 1680 Madison Ave, Wooster, OH 44691. (Email: [email protected])
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Abstract

Weed control in vegetable production is especially challenging, because few registered herbicides simultaneously offer excellent crop tolerance and broad-spectrum weed control. We report here the response of several vegetables and weeds to 37.5 and 50 g ai ha−1 of the new herbicide bicyclopyrone (BCP). Vegetable crops showed good tolerance to BCP PRE and post-directed (POST-DIR) in high organic matter content muck soil. POST BCP severely injured all crops. Soil type and the rate of BCP PRE significantly affected response of vegetable crops, and variety of onion was significant. POST BCP controlled hairy galinsoga and small common purslane plants (>80% injury). Hairy galinsoga was not controlled by BCP PRE application in muck soil but was controlled in a 2:3 (vol/vol) blend of Wooster silt loam and a commercial potting mix. Common purslane was slightly injured in the muck soil and was well controlled in the soil and potting mix blend by PRE BCP. The herbicide did not control prostrate pigweed in either soil type or at any growth stage.

Keywords

Steve FennimoreUniversity of CaliforniaDavisBicyclopyronecommon purslane, Portulaca oleracea L.hairy galinsoga, Galinsoga quadriradiata Cav.prostrate pigweed, Amaranthus blitoides S. Wats.onion, Allium cepa L.Vegetablesherbicide tolerancesoil typesweed control
Type
Note
Information
Weed Technology , Volume 32 , Issue 4 , August 2018 , pp. 498 - 505
Copyright
© Weed Science Society of America, 2018 

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