Search results for " Glyphosate"
showing 10 items of 13 documents
Reportage chaine You tube " Tous Terriens" Arte, "Situation d'impasse en agriculture de conservation"
2020
« Arrêt du glyphosate : les alternatives en Agriculture de conservation des sols », sur Tous Terriens
Mode of action of herbicidal derivatives of aminomethylenebisphosphonic acid. I. Physiologic activity and inhibition of anthocyanin biosynthesis
1996
N-Pyridylaminomethylenebisphosphonic acids constitute a class of promising herbicides. Since their mode of action at the cellular level is still poorly understood, we studied the influence of N-pyridylaminomethylenebisphosphonic acids on plant growth, at the whole plant and undifferentiated tissue levels, using seedlings and cell suspension cultures of mono- and dicotyledonous species. These compounds exhibited strong herbicidal properties, being equipotent with the popular herbicide glyphosate. Since they also depressed buckweed anthocyanin biosynthesis, the shikimate pathway could represent a site of action of N-pyridylaminomethylenebisphosphonic acids.
Glyphosate : comment sortir de l’impasse ? L’expertise d’un chercheur agronome
2018
International audience
El problema de la aplicación tardía del principio de precaución en las aspersiones aéreas con Glifosato contra cultivos de uso ilícito en Colombia: L…
Reportage chaine You tube " Tous Terriens" Arte, sur l'exploitation de l'agriculteur Alain Krebs, à Suilly-la-Tour, avec les interventions de Stéphan…
2020
« Arrêt du glyphosate : les alternatives en Agriculture de conservation des sols », sur Tous TerriensLes expérimentations conduites au sein de la plateforme CA-SYS et dans le réseau de ses agriculteurs partenaires pour tester les alternatives au glyphosate sont mises à l’honneur dans ce reportage signé du journaliste Pierre Girard (Xenius, sur Arte) pour sa chaîne YouTube « Tous Terriens ».Voir ici le reportage sur l'exploitation de l'agriculteur Alain Krebs, à Suilly-la-Tour, avec les interventions de Stéphane Cordeau sur la plateforme CA-SYS, à Bretenière.
Risque de résistance au glyphosate dans les systèmes de culture à base de maïs et effet sur la production agricole et la biodiversité
2017
EASPEGESTADAGROSUPINRA; L'utilisation répétée du glyphosate, en interculture et/ou en culture (dans le cas de cultures tolérantes au glyphosate), peut conduire à la sélection de populations d’adventices résistantes à cet herbicide. Dans cette étude, nous avons introduit un module de génétique dans le modèle de dynamique adventice FLORSYS prédisant mutation, sélection et coûts de la résistance. Nous avons simulé des systèmes de culture à base de maïs, avec différentes fréquences d'application de glyphosate, rotations, intensités de travail du sol et dates de semis. Nous avons analysé la probabilité et le délai d'apparition de la résistance, ainsi que son impact sur la nuisibilité et les béné…
Stem-injection of herbicide for control of Ailanthus altissima (Mill.) Swingle: a practical source of power for drilling holes in stems
2013
Abstract: Ailanthus altissima is a well-known invasive tree in many parts of the world showing an outstanding ability to establish within woodlands and other less-disturbed habitats. Previous studies have reported that control of this species is very difficult because of its strong resprouting. Indeed, effective control can be achieved only by mechanical treatment followed by the application of a systemic herbicide. Operating drills or saws and other mechanical equipment require electric power supply which is not readily available in many invaded sites, notably shrubslands and woodlands. In two study sites, we evaluated control obtained by glyphosate through a stem-injection technique and c…
Mode of action of herbicidal derivatives of aminomethylenebisphosphonic acid. Part II. Reversal of herbicidal action by aromatic amino acids
1997
The herbicidal action of N-pyridylaminomethylenebisphosphonic acids is accompanied by an impairment of anthocyanin biosynthesis. This suggests that they might act as inhibitors of some steps in aromatic amino acid biosynthesis. Herbicidal effects were reversed by aromatic amino acids using both bacterial and plant models, a finding that strongly supports this hypothesis. Structural features of these compounds suggest the sixth enzyme in the shikimate pathway 5-enol-pyruvoylshikimate-3-phosphate (EPSP) synthase as a possible target, since a strong structural similarity exists between aminomethylenebisphosphonic acid and an inhibitor of EPSP synthase, the herbicide glyphosate. This is, howeve…
Organophosphonate utilization by the wild‐type strain of cladosporium resinae
1997
We studied the biodegradation of compounds containing phosphorus‐to‐carbon bond by using wild‐type strain of Cladosporium resinae. The substrate specificity of the strain was studied and we found that it is able to utilize a range of structurally diverse organophosphonates as a sole source of phosphorus. This ability is inducible as indicated by the presence of a lag phase of the growth. A popular herbicide glyphosate is also degraded by the fungi. This indicates that Cladosporium resinae may play an important role in biodegradation of this herbicide. The strain which we used, however, did not metabolise any phosphonates when they served as the sole carbon or nitrogen sources.
Herbicidal derivatives of aminomethylenebisphosphonic acid. Part III. Structure-activity relationship.
1997
Derivatives of aminomethylenebisphosphonic acids constitute a class of promising herbicides. More than 40 N-substituted aminomethylenephosphonic acids were synthesized and evaluated for their herbicidal activity on common cress (Lepidium sativum L.) and cucumber (Cucumis sativus L.). Some of the tested compounds were found to exhibit strong herbicidal properties being equal in activity with the popular herbicide glyphosate as well as parent N-pyridylaminomethylenephosphonic acids. N-Substituted iminodi(methylenephosphonic) acids, which may be considered as close analog of glyphosate, were inactive toward test plants.