Influence des successions culturales sur les maladies du pied et des racines du blé d'hiver

Colbach, Nathalie; Lucas, P.; Cavelier, N.

doi:10.1051/agro:19940805

Cited by 23 publications

(16 citation statements)

References 12 publications

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“…The values of the parameters obtained for the variable 'inoculum' with the three models presented above are largely consistent with published results (Colbach et al 1994). The effect of the variable 'inoculum' on C 2 was not investigated because we assumed that the amount of initial inoculum would not affect the parameter linked to secondary infections (Colbach et al 1999).…”

Section: Discussionsupporting

confidence: 85%

“…This model may be generalised to include interactions between input variables, but we do not consider this possibility here because published studies provide no evidence of significant interactions (Colbach et al, 1994(Colbach et al, , 1997 and because such interactions are accounted for by the multiplicative functions described below.…”

Section: Equations For Dynamic Modelsmentioning

confidence: 99%

“…We therefore used the 'pre-previous crop · previous crop · soil tillage' combination to reflect the initial inoculum level, with nine levels, depending on the data set. We distinguished between host, non-host and amplifying crops as described by Colbach et al (1994). Cases of wheat monoculture are considered separately.…”

Section: Inoculummentioning

confidence: 99%

“…Rotation and soil tillage determine the position of infectious residues in the soil profile, as shown for eyespot (Colbach and Meynard 1995). The amount of wheat at risk from take-all increases with increasing number of host crops in the rotation (Colbach et al 1994), but wheat monoculture can lead to a biological suppression of the disease known as take-all decline (Hornby 1983), which has been attributed to antagonistic microflora (e.g. fluorescent pseudomonads).…”

Section: Introductionmentioning

confidence: 99%

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Evaluation of models to predict take-all incidence in winter wheat as a function of cropping practices, soil, and climate

et al. 2007

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The incidence and severity of take-all, caused by Gaeumannomyces graminis var. tritici (Ggt), in susceptible crops depend on climate, soil characteristics and cropping practices. Take-all can be controlled by modifying crop rotation, crop management and fungicide treatment. When available, fungicides are used as a seed treatment and are partially effective. There is currently no reliable method for helping farmers to optimise their choice of cropping system to improve take-all control. In this study, we defined 16 models, based on various mathematical functions and input variables, for predicting disease incidence in a wheat crop as a function of soil characteristics, climate, crop rotation and crop management. The parameters of these models were estimated from field experiments carried out at six sites in the north of France over a ten-year period. The root mean squared error of prediction (RMSEP) values of the models were estimated by cross validation and compared. RMSEP was in the range 16.34-65.93% and was higher for the models based on multiplicative functions. The lowest RMSEP value was obtained for a dynamic model simulating disease incidence during the crop cycle and which included among input variables the percentage of diseased plants determined at GS3

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Section: Discussionsupporting

confidence: 85%

Section: Equations For Dynamic Modelsmentioning

confidence: 99%

Section: Inoculummentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Evaluation of models to predict take-all incidence in winter wheat as a function of cropping practices, soil, and climate

et al. 2007

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“…Les composés issus de la dégradation des GSL pourraient en effet être adsorbés par les colloïdes du sol ou transformés en composés instruments. Munnecke et Martin [85] [90,91], et l'enfouissement de matières organiques peut modifier les caractéristiques physico-chimiques et/ou modifier les populations microbiennes du sol [10,92]. Néanmoins, les cultures de Brassicacées, utilisées en engrais vert, pourraient constituer un moyen de protection efficace contre Aphanomyces.…”

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Effets allélopathiques des Brassicacées via leurs actions sur les agents pathogènes telluriques et les mycorhizes : analyse bibliographique. Partie II

Réau

Bodet

Bordes

et al. 2005

OCL

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Effet allélopathiques des Brassicacées sur les champignons telluriques Cas d'Aphanomyces euteiches, responsable de la pourriture molle du poisNous nous intéresserons ici plus particulièrement à l'influence des cultures de Brassicacées sur un premier champignon pathogène tellurique, le champignon pathogène tellurique : Aphanomyces euteiches, responsable de la pourriture molle du pois. La pourriture molle du pois (Pisum sativum) due à A. euteichesLa pourriture molle du pois (Pisum sativum) est due à un champignon oomycète, Aphanomyces euteiches. Ce champignon est capable de provoquer des pertes de rendement très conséquentes suite à la destruction plus ou moins précoce du système racinaire. Ces pertes peuvent atteindre 10 à 30 q/ha, selon le niveau d'infestation du champ et les conditions climatiques. De nouveaux cas de nécroses racinaires dus à A. euteiches sont signalés chaque année. L'absence de méthodes de protection, hormis la prévision des risques, explique que ce problème soit devenu, depuis les années 1993-1994, une grande préoccupation pour les agriculteurs des régions les plus touchées (grand Bassin parisien en particulier). Parmi les méthodes de lutte envisagées, la réduction du potentiel infectieux du sol par un choix judicieux de plantes « de coupure » semble être une piste intéressante.Plusieurs études concernant l'effet précédent des Brassicacées sur la pourriture molle du pois (A. euteiches) ont été réalisées aux États-Unis à partir des années 60. Nous nous intéresserons dans un premier temps à l'effet des amendements organiques constitués par des enfouissements de Brassicacées sur le potentiel infectieux d'un sol infesté par A. euteiches. Dans un deuxième temps, nous essaierons d'analyser les mécanismes d'action.Voir la première partie dans OCL ; volume 12, n o 3, mai-juin 2005.

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Effects of summer fallow management on take-all of winter wheat caused by Gaeumannomyces graminis var. tritici

Ennaïfar

Lucas²,

Meynard

et al. 2005

Eur J Plant Pathol

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Crop rotation is the oldest, and perhaps the best cultural practice for reducing the risk of take-all. The effects of crops sown before wheat in a rotation are known in detail, but we know little about the opportunities for reducing take-all risk by planting certain crops in the summer period between wheat harvest and the planting of a subsequent winter wheat crop. We investigated the effects on take-all of five summer fallow crops, two soil tillage treatments and a fungicide seed treatment, in a five site-year experiment. We tested the effects of oats, oilseed rape, mustard, ryegrass and volunteer wheat crops. Bare-soil plots were also included. Take-all epidemics varied with year and site. Summer fallow crops had a greater effect on tilled plots. The incidence and severity of take-all were significantly higher in the wheat volunteer plots, whereas maintaining bare soil provided the lowest level of disease. Oilseed rape had no significant effect on take-all incidence in our experiment. The best candidates for reducing take-all risk appeared to be oats, mustard and ryegrass. These summer fallow crops decreased disease levels only when associated with conventional tillage. Summer fallow crops did not alter take-all decline in the same way as a break crop after a wheat monoculture.Abbreviations: AUDPC -area under the disease progress curve; Ggt -Gaeumannomyces graminis var. tritici; GLM -generalised linear model; Gri201, Gri601, Gri702, LR202 and LR203 -field experiment codes (Gri for Grignon and LR for Le Rheu, followed by the order of the assessed wheat crop [2 for second wheat crop, 6 for sixth wheat crop or 7 for seventh wheat crop] and the harvest year [2001, 2002, or 2003]); GS -Zadoks growth stage; GS 15 -5 leaves unfolded; GS 30 -pseudostem elongation; GS 32-33 -midstem elongation; GS 65 -flowering; GS 89 -ripening; F+/F) -with/without fungicide seed treatment; Till/no-till -conventional tillage/direct drilling.

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Influence des successions culturales sur les maladies du pied et des racines du blé d'hiver

Cited by 23 publications

References 12 publications

Evaluation of models to predict take-all incidence in winter wheat as a function of cropping practices, soil, and climate

Evaluation of models to predict take-all incidence in winter wheat as a function of cropping practices, soil, and climate

Effets allélopathiques des Brassicacées via leurs actions sur les agents pathogènes telluriques et les mycorhizes : analyse bibliographique. Partie II

Effects of summer fallow management on take-all of winter wheat caused by Gaeumannomyces graminis var. tritici

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