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Weed management practices in Argentina crops

Published online by Cambridge University Press:  21 June 2019

Julio Alejandro Scursoni Open the ORCID record for Julio Alejandro Scursoni [Opens in a new window] ,
Alejandra Carolina Duarte Vera ,
Fernando Hugo Oreja ,
Betina Claudia Kruk  and
Elba Beatriz de la Fuente
Julio Alejandro Scursoni*
Affiliation:
Professor, Cátedra de Producción Vegetal, Facultad de Agronomía, Universidad de Buenos Aires, Buenos Aires, Argentina
Alejandra Carolina Duarte Vera
Affiliation:
Graduate Student, Cátedra de Cerealicultura, Facultad de Agronomía, Universidad de Buenos Aires – CONICET, Buenos Aires, Argentina
Fernando Hugo Oreja
Affiliation:
Assistant Professor, Cátedra de Cultivos Industriales, Facultad de Agronomía, Universidad de Buenos Aires Buenos Aires, Argentina
Betina Claudia Kruk
Affiliation:
Professor, Cátedra de Cerealicultura, Facultad de Agronomía, Universidad de Buenos Aires, Buenos Aires, Argentina
Elba Beatriz de la Fuente
Affiliation:
Professor, Cátedra de Cultivos Industriales, Facultad de Agronomía, Universidad de Buenos Aires, Buenos Aires, Argentina
*
Author for correspondence: Julio Alejandro Scursoni, Email: [email protected]
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Abstract

Data from surveys are used to help quantitatively diagnose the relative importance of chemical and nonchemical management practices, identify weed problems, and provide potential solutions. However, to our knowledge, such surveys have not been conducted in Argentina. In 2016, advisors and crop producers from cropping areas across Argentina were surveyed through email with the objectives to identify the main weed species problems and assess the use of chemical and nonchemical weed management practices in different crop production areas in Argentina. Fleabane, pigweed, johnsongrass, fingergrass, goosegrass, barnyardgrass, and ryegrass were considered the most important weeds. More than 53% of the producers used only chemical options; 86% used chemical fallow (i.e., keeping weed free with chemical application); 62% used full herbicide rates; 46% used proper herbicide timing; 41% used multiple modes of action; and 32% used rotation of herbicide modes of action. The main nonchemical practices used were crop rotation (45%); avoiding seed production during (31%) and after (25%) the crop cycle; narrow row spacing (19%); and cultivars with greater competitive ability (18%). Less than 15% of the people surveyed used increased crop densities or altered date of sowing. There is a high dependence on chemical control in the main crops grown in Argentina. Extension efforts are needed to emphasize the importance of integrated weed management.

Keywords

Drew Lyon, Washington State Universitybarnyardgrass, Echinochloa crus-galli (L.) Beauv.fleabane, Erigeron spp.fingergrass, Chloris spp.goosegrass, Eleusine indica (L.) Gaertnjohnsongrass, Sorghum halepense (L.) Perspigweed, Amaranthus spp.ryegrass, Lolium perenne L. ssp. multiflorum (Lam.) HusnotSurveyproblematic weedsherbicidescultural practices
Type
Education/Extension
Information
Weed Technology , Volume 33 , Issue 3 , June 2019 , pp. 459 - 463
Copyright
© Weed Science Society of America, 2019 

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