Interactions of glyphosate use with farm characteristics and cropping patterns in Central Europe

Wiese, Armin; Schulte, Michael; Theuvsen, Ludwig; Steinmann, Horst-Henning

doi:10.1002/ps.4542

Cited by 19 publications

(15 citation statements)

References 37 publications

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“…for nicosulfuron, mesotrione, pethoxamid and partly for glyphosate, terbuthylazine, flufenacet, foramsulfuron and iodosulfuron. The survey of Wiese et al (2017) finds with 22% of the farmers applying glyphosate in 2013/14 a similar value compared to our simulated ones.…”

Section: Discussionsupporting

confidence: 84%

Modelling the Effects of a Glyphosate Ban on Weed Management in Silage Maize Production

Böcker

Britz

Finger

2018

Ecological Economics

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Section: Discussionsupporting

confidence: 84%

Modelling the Effects of a Glyphosate Ban on Weed Management in Silage Maize Production

Böcker

Britz

Finger

2018

Ecological Economics

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“…Differences were also observed in terms of the acreage of each crop treated with glyphosate annually and the average glyphosate dose applied to a given crop. Factors that may explain the differences in glyphosate uses across countries include: more or less intensive cropping practices; the average farm size (less time for tillage operations/ploughing on larger farms) [37,42]; the percentage of arable cropping area under reduced tillage relying on glyphosate [43]; the percentage of crops with low herbicide inputs (such as permanent grassland) in the UAA; the status of herbicide resistance (e.g., in the UK, the development of herbicide resistance in black-grass resulted in increased glyphosate use [44]); the climatic conditions favourable for weed development; the preference for and availability of other herbicides; the use of non-chemical alternative weed management practices; the use of cover crops; the management of the intercropping period; and the treatment intensity (intra-row versus the whole surface) in perennial crops. Regarding the dose of glyphosate, it must not exceed the maximum application rate stated in the EU and national regulations.…”

Section: Factors Explaining the Differences Between Countriesmentioning

confidence: 99%

Glyphosate Use in the European Agricultural Sector and a Framework for Its Further Monitoring

et al. 2020

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Monitoring pesticide use is essential for assessing farming practices and the risks associated with the use of pesticides. Currently, there are neither consolidated, public data available on glyphosate use in Europe, nor a standardized categorization of its major uses. In this study, data on glyphosate sales and use in Europe were collected from multiple sources and compiled into a dataset of the agricultural use of glyphosate from 2013 to 2017. The survey shows that glyphosate represented 33% of the herbicide volume sold in Europe in 2017. One third of the acreage of annual cropping systems and half of the acreage of perennial tree crops received glyphosate annually. Glyphosate is widely used for at least eight agronomic purposes, including weed control, crop desiccation, terminating cover crops, terminating temporary grassland and renewing permanent grassland. Glyphosate use can be classified into occasional uses—i.e., exceptional applications, triggered by meteorological conditions or specific farm constraints—and recurrent uses, which are widespread practices that are embedded in farming systems and for which other agronomic solutions may exist but are not frequently used. This article proposes a framework for the precise monitoring of glyphosate use, based on the identification of the cropping systems in which glyphosate is used, the agronomic purposes for which it is employed, the dose used and the rationale behind the different uses.

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“…Although GR crops have not been authorized for cultivation in the European Union, glyphosate is the most commonly used herbicide (Benbrook 2016), and also in Spain (MAPA 2013). The use of glyphosate is mainly associated with reduced-tillage or no-till farming systems (Wiese et al 2018). The weed species we selected for our surveys are among the most prevalent weed species in maize-growing regions in Spain (San Martín et al 2015) and elsewhere in Europe (Dewar 2009;Jensen et al 2011).…”

Section: Resultsmentioning

confidence: 99%

Glyphosate sensitivity of selected weed species commonly found in maize fields

et al. 2019

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Glyphosate resistance has evolved worldwide. Glyphosate is also the most used herbicide in Spain, and current changes in herbicide usage patterns can increase the risk of glyphosate resistance development. The objective of this study was to assess the glyphosate sensitivity of different selected weed species important in Spanish maize (Zea mays L.) fields. To this end, dose–response experiments were conducted under controlled conditions in a growth chamber to examine variation in glyphosate sensitivity among populations of five grass weed species and eight broadleaf weed species that are commonly found in the maize fields in Castilla y León, the biggest maize-growing region in Spain. The glyphosate doses that caused growth reduction by 50% (GR50) were calculated for each weed population. No populations were resistant to glyphosate. In addition, baseline values of glyphosate sensitivity were determined for each weed species. The GR50 baseline values ranged from 10.25 to 53.23 g ai ha−1 for the dicotyledonous weed species and from 16.05 to 66.34 g ai ha−1 for the monocotyledonous weed species. The ratio between the GR50 values of the least and most sensitive populations was used to determine the SI50 (sensitivity index at 50% growth reduction) for each weed species. The SI50 values showed a 1.4- to 3.3-fold difference in sensitivity for dicotyledonous weed species and 1.4- to 2.4-fold difference for monocotyledonous weed species. The sensitivity index was also calculated as the ratio between the GR50 values of the least sensitive population and the baseline GR50 value estimated for a range of susceptible populations (SI50b). SI50b values showed a 1.2- to 1.6-fold difference in sensitivity for dicotyledonous weed species and 1.1- to 1.2-fold difference for monocotyledonous weed species. The sensitivity data generated in this study provide a reference for determining time-dependent changes in glyphosate sensitivity in the commonly found weeds in the maize fields of Castilla y Léon.

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Interactions of glyphosate use with farm characteristics and cropping patterns in Central Europe

Cited by 19 publications

References 37 publications

Modelling the Effects of a Glyphosate Ban on Weed Management in Silage Maize Production

Modelling the Effects of a Glyphosate Ban on Weed Management in Silage Maize Production

Glyphosate Use in the European Agricultural Sector and a Framework for Its Further Monitoring

Glyphosate sensitivity of selected weed species commonly found in maize fields

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