Blé tendre à bas niveau d'intrants : gestions des maladies et des ravageurs

National audienceL'implantation de la culture a permis de mettre en place des mesures préventives afin de limiter les pressions de maladies. Leur gestion reposera donc sur l'observation-décision en fonction des seuils de nuisibilité

EcoPhytoSys-Légumes, un projet bas-normand

National audienc

PICLÉG': a "research, development and stakeholders" all-together initiative for integrated production of field vegetables in France

PICLÉG': a "research, development and stakeholders" all-together initiative for integrated production of field vegetables in France. 3. International Symposium on Horticulture in Europe, SHE201

Dephy Ecophyto filière fruits et légumes: Point d'étape novembre 2011

National audienceRappel des objectifs de DEPHY écophyto Organisation du réseau DEPHY écophyto 1. Structuration du réseau DEPHYécophyto 2. Organisation du réseau DEPHYécophyto Instances de gouvernance Ecophyto Perspectives DEPHYécophyt

Blé tendre à bas niveau d'intrants : interventions de sortie d'hiver

National audienc

Implantation des cultures légumières : s’adapter aux contraintes de marché et à la diversité des situations

National audienc

Airborne versus soilborne inoculum: White mould, where do you come from?

International audienceIdentifying the sources of fungal inoculum that induces epidemics is instrumental to managing crop health in a more efficient way by implementing prophylactic methods and by using better targeted biocontrol and fungicide applications. For some phytopathogenic fungi, this identification is hampered by the multiplicity of inoculum types. This is the case for Sclerotinia sclerotiorum, the agent of white mould, which can produce ascospores disseminated via the atmosphere, sclerotia stored in the soil and mycelium in plant debris of a large variety of hosts. The present study aims to assess the relative importance of airborne and soilborne inocula in white mould disease development and its persistence across two crop seasons. S. sclerotiorum isolates were collected from air, soil and carrot plants during two crop seasons in south-western France and genotyped with 16 microsatellite markers. Among the 490 isolates, 162 clonal lineages were identified. The genetic characteristics did not differ significantly among isolates collected from air, soil and carrots. The epidemics of white mould on carrots were initiated either by airborne inoculum or by soilborne inoculum. It also appears that some isolates from airborne inoculum persisted from year to year