A New Approach to Weed Management to Mitigate Herbicide Resistance in Argentina

The evolution of herbicide-resistant weeds is a major concern in the corn- and soybean-producing Pampas region of Argentina, where growers predominantly plant glyphosate-resistant crop varieties and depend heavily on glyphosate for weed control. Currently, 16 weed species in Argentina are resistant...

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Bibliographic Details
Published in:Weed science 2016-01, Vol.64 (sp1), p.641-648
Main Authors: Rubione, Claudio, Ward, Sarah M
Format: Article
Language:English
Subjects:
20th century
Agricultural industry
Agricultural land
Agricultural management
Agricultural practices
Agricultural production
Agriculture
Argentina
Corn
Crop production
Crop rotation
Crops
Economic reform
export taxes
Farmers
Farms
herbicide resistance
Herbicides
Land ownership
land tenancy
lease law
Leasing
Pampas
Soybeans
Taxation
Weed control
Weeds
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Summary:The evolution of herbicide-resistant weeds is a major concern in the corn- and soybean-producing Pampas region of Argentina, where growers predominantly plant glyphosate-resistant crop varieties and depend heavily on glyphosate for weed control. Currently, 16 weed species in Argentina are resistant to one or more of three different herbicide mechanisms of action, and resistant weed populations continue to increase, posing a serious threat to agricultural production. Implementation of integrated weed management to address herbicide resistance faces significant barriers in Argentina, especially current land ownership and rental patterns in the Pampas. More than 60% of Pampas cropland is rented to tenants for periods that rarely exceed 1 yr, resulting in crop rotation being largely abandoned, and crop export taxes and quotas have further discouraged wheat and corn production in favor of continuous soybean production. In this paper we discuss ways to facilitate new approaches to weed management in Argentina, including legal and economic reforms and the formation of a national committee of stakeholders from public and private agricultural sectors.
ISSN:0043-1745
1550-2759
DOI:10.1614/WS-D-16-00016.1