Institution: Independent Researcher

About the lab

The primary mission of the lab of the "Association des Producteurs de Noisettes (ANPN)" is to minimise the impact of pathogen disease to the hazelnut quality and to select hazelnut cultivars. The ANPN has a strong experience in biocontrol and is a major actor in pest control in French hazel orchards. The ANPN is a partnership with INRAE since 1995 and the head leader of the European project against stink bugs (REPLIK) and against the nut weevils and the indian meal moths (BALAMITE). The ANPN also works on the evaluation of new hazelnut cultivars and their adaptability to various growing conditions such as planting density, rootstock effect, soil and climate conditions or phenology (OPTIVAR). More details at

Featured projects (3)

French hazel orchards are damaged by the green shield bug (GSB), Palomena prasina (Hemiptera: Pentatomidae). P. prasina is not exclusive to Corylus avellana. Adults and nymphs need to feed from different plant species. Plant diversity and habitats provided by hedges increase GSB population in orchards borders. Hedge composition could be a key issue between the pest and its natural enemies. Indeed, some plant species provide food sources and habitats for natural enemies. Current tendencies to reduce the application of chemical agro-protections lead to several ecofriendly strategies to reduce the GSB attacks to more acceptable levels. Plant management is one of them. Making the environment less suitable for the pest survival and more suitable for natural enemies should lead to pest population reduction. Indeed, (1) control of host plants can reduce the available resources for the GSB (i.e. fruits, pods and seed for adults) during its key life stages ; (2) reduction of alternative plant resources during the vegetative phase of hazel trees and competitive host plants during hazel fructifications may negatively impact edge GSB populations; (3) promoting plant species providing suitable food sources and habitats for natural enemies without supporting the pest species may reduce GSB populations. The project will aim at developing plant management solutions to reduce pest damages in hazel orchards by : (1) studying the dynamics of the populations according to plant diversity of hedges, (2) assessing the role of the host plants in the maintenance and/or in the dispersal of the pest, (3) identifying natural enemies and their hosts (such as parasites and parasitoids) and finally (4) studying the dispersal abilites of adults and nymphs in fields.
Test of chemical and biological products in order to reduce the impact of Curculio nucum on halzelnuts yield quality and quantity
Evaluation of growth, productivity and physiology of hazelnuts cultivars in France across a range of study sites.

Featured research (16)

To date, distinct codes and phenological scales are currently employed for monitoring the annual life cycle of a hazelnut. These scales works well in specific areas but do not translate well for a broader use. Thus, a universal scale adaptable to all areas will allow standardization of phenological monitoring for hazelnut. Two recently published articles (Paradinas et al., 2022; Taghavi et al., 2022) attempted to standardize the phenological stages of hazelnuts based on the BBCH scale. The BBCH scale is an international recognized standard that has been adapted for a number of commercial woody species. The BBCH scale presents the plant phenological stages according to a numerical scale.

Lab head

Maud Thomas
  • Association Nationale des Producteurs de Noisettes (ANPN)

Alumni (3)

Mélanie Souchaud
  • Université d´Avignon et des Pays du Vaucluse
Marion Devaux Mercadal
  • FCBA Institut Technologique
Jean Paul Sarraquigne
Jean Paul Sarraquigne