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Saflufenacil Carryover Injury Varies among Rotational Crops

Published online by Cambridge University Press:  20 January 2017

Darren E. Robinson  and
Kristen E. McNaughton
Darren E. Robinson*
Affiliation:
Department of Plant Agriculture, University of Guelph, Ridgetown Campus, Ridgetown, ON N0P 2C0, Canada
Kristen E. McNaughton
Affiliation:
Department of Plant Agriculture, University of Guelph, Ridgetown Campus, Ridgetown, ON N0P 2C0, Canada
*
Corresponding author's E-mail: [email protected]
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Abstract

Trials were established in 2007, 2008, and 2009 in Ontario, Canada, to determine the effect of soil residues of saflufenacil on growth, yield, and quality of eight rotational crops planted 1 yr after application. In the year of establishment, saflufenacil was applied PRE to field corn at rates of 75, 100, and 200 g ai ha−1. Cabbage, carrot, cucumber, onion, pea, pepper, potato, and sugar beet were planted 1 yr later, maintained weed-free, and plant dry weight, yield, and quality measures of interest to processors for each crop were determined. Reductions in dry weight and yield of all grades of cucumber were determined at both the 100 and 200 g ha−1 rates of saflufenacil. Plant dry weight, bulb number, and size and yield of onion were also reduced by saflufenacil at 100 and 200 g ha−1. Sugar beet plant dry weight and yield, but not sucrose content, were decreased by saflufenacil at 100 and 200 g ha−1. Cabbage plant dry weight, head size, and yield; carrot root weight and yield; and pepper dry weight, fruit number and size, and yield were only reduced in those treatments in which twice the field corn rate had been applied to simulate the effect of spray overlap in the previous year. Pea and potato were not negatively impacted by applications of saflufenacil in the year prior to planting. It is recommended that cabbage, carrot, cucumber, onion, pepper, and sugar beet not be planted the year after saflufenacil application at rates up to 200 g ha−1. Pea and potato can be safely planted the year following application of saflufenacil up to rates of 200 g ha−1.

En 2007, 2008 y 2009 se establecieron ensayos en Ontario, Canadá para determinar el efecto de residuos de saflufenacil en el suelo sobre el crecimiento, rendimiento y calidad de ocho cultivos en rotación sembrados un año después de la aplicación. En el año del establecimiento, el saflufenacil fue aplicado PRE en campos de maíz a dosis de 75, 100 y 200 g ia ha−1. Los cultivos en rotación que se sembraron un año más tarde fueron: col, zanahoria, pepino, cebolla, arveja, pimiento, papa y remolacha azucarera; se mantuvieron libres de malezas y se determinaron para cada cultivo el peso seco, el rendimiento y los parámetros de calidad de interés para los procesadores. Reducciones en el peso seco y el rendimiento en todas las categorías de pepino fueron determinadas tanto para las dosis de 100 como de 200 g ha−1 de saflufenacil. El peso seco de la planta, el número de bulbos y el tamaño y rendimiento de la cebolla, también se redujeron con ambas dosis de saflufenacil. Con el uso de saflufenacil a 100 y 200 g ha−1, el peso seco y el rendimiento de la remolacha disminuyeron, pero no así el contenido de sucrosa. El peso seco, el tamaño de la cabeza y el rendimiento de la col, el peso de la raíz y el rendimiento de la zanahoria, el peso seco, el número y tamaño de frutos y el rendimiento del pimiento, solamente se redujeron en aquellos tratamientos donde se aplicó el doble de la dosis normal para el maíz para simular el efecto del traslape de aspersión en el año anterior. La arveja y la papa no fueron negativamente impactadas por las aplicaciones de saflufenacil en el año anterior a la siembra. Se recomienda que la col, la zanahoria, el pepino, la cebolla, el pimiento y la remolacha no se siembren el año posterior a las aplicaciones de saflufenacil a dosis de hasta 200 g ha−1. La arveja y la papa pueden sembrarse con seguridad el año siguiente a las aplicaciones de saflufenacil a dosis de hasta 200 g ha−1.

Keywords

saflufenacilcabbage, Brassica oleracea var. italica Plenckcarrot, Daucus carota L.corn, Zea mays L.cucumber, Cucumis sativus L.onion, Allium cepa L.pea, Pisum sativum L., pepper, Capsicum sativa L.potato, Solanum tuberosum L.sugar beet, Beta vulgaris L.Rotational cropsherbicide carryover
Type
Weed Management—Major Crops
Information
Weed Technology , Volume 26 , Issue 2 , June 2012 , pp. 177 - 182
Copyright
Copyright © Weed Science Society of America 

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