Quelle sélection fruitière pour une production durable, à faible niveau d’intrants ? Méthodologie pour un réseau de sélection variétale décentralisée

In France Fruit production is cultivated on 140 thousand hectares, mainly conducted on intensive training system. Very few elements are available on low input training systems while they have to integrate the Global rule under the frame of Ecophyto 2018. In order to evaluate if another system of cultivation will be possible, a project has been developed to highlight the main factors to be integrated in low input training system. A low input multilocal experimental design has thus been investigated on apricot in two main regions of production: Rhone valley and Roussillon. A set of 9 common cultivars with 20 replications each, planted in a complete single-tree randomization design has been established. As already observed in apple orchard, a larger set of disease has been observed in our experimental plots by comparison with conventional training orchards. A large genetic variability has been set-up among the observed cultivars, but if some of them expressed components of resistance against the observed diseases no one appeared widely resistant to all the diseases. Taking in consideration the longevity of the orchard, a huge concern exists with the tested germplasm because the observed dieback was in between 10 and 80% of the trees according to the cultivars after only 6 years of observation. On the methodological point of view, a clear optimization of the experimental design is expected on the base of the observed results

Assessment of diseases susceptibility of peach cultivars in experimental plots and on-farm for organic and low-input systems. Baseline of French case studies

Despite a high turn-over of new peach cultivars, their suitability for organic and low-input systems remains unknown for most of them. Diseases susceptibility is an important criteria to consider since diseases control is a bottleneck to peach production in theses systems. Since 2001, 81 peach cultivars were assessed in 2 experimental sites and 7 on-farm plots

Prunus - Réalités et perspectives de l'écologisation en arboriculture fruitière: Pour une approche intégrée à partir des cas des vergers de pêchers et d'abricotiers en Rhône-Alpes 2013-2015

Le projet « PRUNUS- Réalités et perspectives de l’écologisation en arboriculture fruitière » a été financé par le programme Pesticides* du ministère de l’environnement sur la période 2013-2015 avec pour objectif d’identifier les effets de verrouillage et les leviers de transition vers une écologisation des pratiques agricoles (réduction des pesticides) dans les vergers de pêchers et d’abricotiers de la basse Vallée du Rhône

Long-term evolution of flowering time in apricot cultivars grown in southern France: which future impacts of global warming?

International audienceThe evolution of flowering time in apricot cultivars grown in different French growing areas over the last 22 years was examined. This highlighted important fluctuations between years but similar evolutions between areas and cultivars of different origins. It indicates a determining influence of yearly climatic conditions. The analysis of yearly fluctuations in terms of chilling and heat requirements, on the basis of floral primordia growth, suggests that different impacts of global warming could arise in the future. An improvement of flowering-time modelling is also suggested

Long-term evolution of flowering time in cultivars grown in the south-east of France: what impacts to come in the context of global warming

International audienc

La taille du pecher

Note interne *INRA SRIV, St Marcel les Valence (FRA) Diffusion du document : INRA SRIV, St Marcel les Valence (FRA)National audienc

Apricot susceptibility to blossom brown rot (Monilinia spp.) and leaf rust (Tranzschelia spp.) under low-input production system

Production regularity in organic apricot orchards is highly constrained by blossom brown rot caused by Monilinia spp. infections on flowers. Leaf rust (Tranzschelia spp.) development can induce early defoliation, which is detrimental to tree vigour and yield. Copper-based treatments are partially efficient against both diseases but their negative environmental impact should be considered. The choice of cultivars according to disease susceptibility criterions is a key-step towards low-input production systems. This poster presents the susceptibilities to blossom brown rot and leaf rust of 16 apricot cultivars observed during 5 years in two sites

Inheritance of floral necrosis trait in apricot tree

National audienc

Inheritance of floral abortion in apricot tree

National audienc

Architectural diversity of apricot trees: which morphological characters can be used to classify cultivars

National audienc