Influence of glyphosate-resistant cropping systems on weed species shifts and glyphosate-resistant weed populations

Johnson, William G.; Davis, Vince M.; Kruger, Greg R.; Weller, Stephen C.

doi:10.1016/j.eja.2009.03.008

Cited by 134 publications

(114 citation statements)

References 79 publications

Supporting

Mentioning

104

Contrasting

Unclassified

Order By: Relevance

“…This is due mainly to the widespread use of glyphoresistant seeds [2], which inhibits the growth of competitive weeds in combination with glyphosate [3][4] allowing crops to be very productive and efficient at low cost [5] [6]. Glyphoresistant seeds are genetically modified organisms, mainly soya, corn, canola, wheat, sugar beet, and cotton [7].…”

Section: Introductionmentioning

confidence: 99%

Glyphosate detection with ammonium nitrate and humic acids as potential interfering substances by pulsed voltammetry technique

Gil

Laguarda-Miró

Camino

et al. 2013

Talanta

View full text Add to dashboard Cite

ElsevierMartínez Gil, P.; Laguarda Miró, N.; Soto Camino, J.; Masot Peris, R. (2013) AbstractPulsed voltammetry has been used to detect and quantify glyphosate on buffered water in presence of ammonium nitrate and humic substances. Glyphosate is the most widely used herbicide active ingredient in the world. It is a non-selective broad spectrum herbicide but some of its health and environmental effects are still being discussed. Nowadays, glyphosate pollution in water is being monitored but quantification techniques are slow and expensive. Glyphosate wastes are often detected in countryside water bodies where organic substances and fertilizers (commonly based on ammonium nitrate) may also be present. glyphosate also forms complexes with humic acids so these compounds have also been taken into consideration. The objective of this research is to study the interference of these common pollutants in glyphosate measurements by pulsed voltammetry. The statistical treatment of the voltammetric data obtained lets us discriminate glyphosate from the other studied compounds and a mathematical model has been built to quantify glyphosate concentrations in a buffer despite the presence of humic substances and ammonium nitrate. In this model, the coefficient of determination (R 2 ) is 0.977 and the RMSEP value is 2.96x10 -5 so the model is considered statistically valid.

show abstract

Section: Introductionmentioning

confidence: 99%

Glyphosate detection with ammonium nitrate and humic acids as potential interfering substances by pulsed voltammetry technique

Gil

Laguarda-Miró

Camino

et al. 2013

Talanta

View full text Add to dashboard Cite

show abstract

“…Such a huge selection pressure induced by the use of a single herbicide has quickly led to the emergence of glyphosate-resistant weeds [42][43][44][45][46][47]. CA systems, with their emphasis on crop rotations and associations, will reduce weed pressure, however, there is a challenge for farmers who engage in CA in an environment where resistance to glyphosate has occurred, as this will reduce the applicability of the herbicide.…”

mentioning

confidence: 99%

Sustainable Weed Management for Conservation Agriculture: Options for Smallholder Farmers

Sims¹,

Corsi²,

Gbèhounou³

et al. 2018

Agriculture

View full text Add to dashboard Cite

Land degradation and soil fertility deterioration are two of the main causes of agricultural production stagnation and decline in many parts of the world. The model of crop production based on mechanical soil tillage and exposed soils is typically accompanied by negative effects on the natural resource base of the farming environment, which can be so serious that they jeopardize agricultural productive potential in the future. This form of agriculture is destructive to soil health and accelerates the loss of soil by increasing its mineralization and erosion rates. Conservation agriculture, a system avoiding or minimizing soil mechanical disturbance (no-tillage) combined with soil cover and crop diversification, is considered a sustainable agro-ecological approach to resource-conserving agricultural production. A major objective of tillage is supposed to be weed control, and it does not require very specific knowledge because soil inversion controls (at least temporarily) most weeds mechanically (i.e., by way of burying them). However, repeated ploughing only changes the weed population, but does not control weeds in the long term. The same applies to the mechanical uprooting of weeds. While in the short term some tillage operations can control weeds on farms, tillage systems can increase and propagate weeds off-farm. The absence of tillage, under conservation agriculture, requires other measures of weed control. One of the ways in which this is realized is through herbicide application. However, environmental concerns, herbicide resistance and access to appropriate agro-chemicals on the part of resource-poor farmers, highlight the need for alternative weed control strategies that are effective and accessible for smallholders adopting conservation agriculture. Farmers in semi-arid regions contend with the additional challenge of low biomass production and, often, competition with livestock enterprises, which limit the potential weed-suppressing benefits of mulch and living cover crops. This paper reviews the applicability and efficacy of various mechanical, biological and integrated weed management strategies for the effective and sustainable management of weeds in smallholder conservation agriculture systems, including the role of appropriate equipment and prerequisites for smallholders within a sustainable intensification scenario.Keywords: smallholder farming; conservation agriculture; sustainable and ecological weed management; preventive; cultural and direct control methods of weed management

show abstract

“…One explanation for these results is that most GM crops were not developed to enhance productivity or edaphoclimatic adaptability, but mainly to be resistant to herbicides. Other studies have demonstrated that changes in patterns of herbicide use such as an increase in the total amount of glyphosate applied (kg/ha) were related to the adoption of GM soybean 14,20,21 . A study performed in the US between 1990 and 2002 also showed an increase in glyphosate use when herbicide-resistant GM soybeans were authorized (1996) 8 .…”

Section: Resultsmentioning

confidence: 99%

“…Several factors associated with the cultivation of herbicide-resistant GM crops may contribute to the increased use of pesticides and losses in productivity, including biological vulnerability, weed resistance, and decreased soil fertility 14,[21][22][23][24][25][26][27][28][29][30] .…”

Section: Resultsmentioning

confidence: 99%

Use of genetically modified crops and pesticides in Brazil: growing hazards

Almeida

Friedrich

Tygel³

et al. 2017

Ciênc. saúde coletiva

View full text Add to dashboard Cite

show abstract

Influence of glyphosate-resistant cropping systems on weed species shifts and glyphosate-resistant weed populations

Cited by 134 publications

References 79 publications

Glyphosate detection with ammonium nitrate and humic acids as potential interfering substances by pulsed voltammetry technique

Glyphosate detection with ammonium nitrate and humic acids as potential interfering substances by pulsed voltammetry technique

Sustainable Weed Management for Conservation Agriculture: Options for Smallholder Farmers

Use of genetically modified crops and pesticides in Brazil: growing hazards

Contact Info

Product

Resources

About