Landscape composition and farming practices affect the abundance of the codling moth and its predation and parasitism in apple orchards

National audience; There is increasing recognition that landscape management could contribute to sustainable pest control. However, while many studies indicate that the proportion of semi-natural habitat over the landscape correlates positively with the abundance and diversity of natural enemies in elds, results are more equivocal concerning the reduction of pest abundance. This last result is possibly due to the diversity of land-use intensity in the landscapes. In the present studies, we assessed whether amount of semi-natural habitat and pesticide use at both local and landscape scales a ected the abundance of codling moth (Cydia pomonella, lepidoptera), its parasitism and predation of s…

Analyse multi-échelle des effets du contexte paysager et des pratiques agricoles sur la pression en ravageurs et sur l’utilisation d’insecticides en filière grande culture

Réduire la dépendance de l'agriculture aux pesticides est aujourd’hui nécessaire car ces intrants sont néfastes à l'environnement, à la santé humaine et à la biodiversité. Des études récentes suggèrent que la simplification des paysages est associée à une plus forte utilisation des pesticides, mais cette question fait encore l'objet de débats. Ici, nous avons analysé l'utilisation d'insecticides enregistrée dans 1569 fermes DEPHY à travers la France, classées en fonction des types de rotations (basées sur le blé, le maïs ou les prairies temporaires). Nous montrons que dans les systèmes à base de blé et de maïs, l'utilisation d'insecticides diminue avec la complexité du paysage environnant, …

Exploring the potential of co-designed landscapes to promote biological pest control

Contribution of landscape drivers to explain crop pest infestation levels at national scale

Managing crop pests in an integrated framework requires increased knowledge aboutpest abundance drivers. Landscape properties, agricultural practices or climate can affectthe presence of crop pests at different scales. However, few studies considered these affectsat national scale, due to a lack of data. In this study, we analysed the effect of climatic conditions and land-uses occupation on the level of pest infestation of three types of pests: slugs(Deroceras reticulatum & Arion hortensis); cereal aphids (Sitobion avenae & Rhopalosiphumpadi) and oilseed rape pests (Meligethes aeneus & Ceuhtorrhynchus napi). Pest infestationlevels were derived the French national epidemiological monitoring…