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Titre du document / Document title

Does large-scale cropping of herbicide-resistant cultivars increase the incidence of polyphagous soil-borne plant pathogens?

Auteur(s) / Author(s)

TERMORSHUIZEN A. J. (1) ; LOTZ L. A. P. (2) ;

Affiliation(s) du ou des auteurs / Author(s) Affiliation(s)

(1) Biological Farming Systems, Wageningen University, Marijkeweg 22, 6709 PG Wageningen, PAYS-BAS
(2) Plant Research International, Wageningen, PAYS-BAS

Résumé / Abstract

Transgenic resistance to broad-spectrum herbicides is increasingly seen in various crops. With transgenic herbicide-resistant (THR) cultivars, application of broad-spectrum herbicides is no longer limited to the pre-emergence stage of the crop. Post-emergence application of these herbicides may be more effective in obtaining sufficient weed control compared with currently used herbicides, and herbicide treatment can be delayed compared with that in non-THR crops, thereby controlling weeds at a larger plant size. A well known side effect of glyphosate and glufosinate ammonium is the emergence ofso-called 'herbicide-synergists', ie opportunistic root pathogens that accelerate the killing of roots that are herbicide-sensitive. These opportunistic plant pathogens, multiplying in the dying roots of weeds, may affect THR crops. In addition, suppressive effects of glyphosate and/or glufosinate ammonium on the saprophytic and antagonistic microflora have been reported and may enhance the activity of root pathogens. The authors hypothesize that delaying herbicide use in THR cultivars to optimize weed control results in increased infections by root pathogens. Controlled field experiments on the interactions between crops, pathogens and weeds are required to test this hypothesis.

Revue / Journal Title

Outlook on agriculture    ISSN  0030-7270   CODEN OUAGA8 

Source / Source

2002, vol. 31, no1, pp. 51-54 (32 ref.)

Langue / Language

Anglais

Editeur / Publisher

Turpin, Herts, ROYAUME-UNI  (1956) (Revue)

Mots-clés anglais / English Keywords

Aminoacid

;

Pesticides

;

Herbicide

;

Organic phosphonate

;

Plant pathogen

;

Systemic

;

Thallophyta

;

Soilborne transmission

;

Cultivated soil

;

Glyphosate

;

Weed

;

Fungi

;

Cultivar

;

Transgenic plant

;

Cultivated plant

;

Postemergence

;

Preemergence

;

Application time

;

Secondary effect

;

Host agent relation

;

Genetic engineering

;

Pesticide resistance

;

Chemical weed control

;

Mots-clés français / French Keywords

Aminoacide

;

Pesticide

;

Herbicide

;

Phosphonate organique

;

Phytopathogène

;

Systémique

;

Thallophyta

;

Transmission par sol

;

Glufosinate

;

Sol cultivé

;

Glyphosate

;

Mauvaise herbe

;

Fungi

;

Cultivar

;

Plante transgénique

;

Plante cultivée

;

Postlevée

;

Prélevée

;

Epoque traitement

;

Effet secondaire

;

Relation hôte agent

;

Génie génétique

;

Résistance pesticide

;

Désherbage chimique

;

Mots-clés espagnols / Spanish Keywords

Aminoácido

;

Plaguicida

;

Herbicida

;

Fosfonato orgánico

;

Fitopatógeno

;

Sistémico

;

Thallophyta

;

Transmisión por suelo

;

Suelo cultivado

;

Glyphosate

;

Malezas

;

Fungi

;

Cultivar

;

Planta transgénica

;

Planta cultivada

;

Postemergencia

;

Preemergencia

;

Epoca tratamiento

;

Efecto secundario

;

Relación huesped agente

;

Ingeniería genética

;

Resistencia plaguicida

;

Deshierba química

;

Localisation / Location

INIST-CNRS, Cote INIST : 19313, 35400010263060.0060

Nº notice refdoc (ud4) : 13511891



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