يعرض 1 - 20 نتائج من 33,967 نتيجة بحث عن '"Agronomie"', وقت الاستعلام: 0.70s تنقيح النتائج
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    Conference
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    Conference

    المصدر: NOSE2024, International Conference on ENVIRONMENTAL MONITORING of ODOURS and VOCs, 15-18 September 2024

    Relation: Volatile organic compounds (VOCs) serve pivotal functions in the intricate interactions withinplant ecosystems, facilitating communication among plants and other b i o t i c constituents suchas pollinators and soil organisms. While airborne VOCs have garnered considerable scientificattention, belowground VOCs remain comparatively understudied. Nevertheless, thesebelowground compounds intricately mediate signaling pathways between plants, soil bacteria,fungi, belo wground insects, nematodes, and bacterial consortia. The primary limitation tounderstanding subterranean VOC dynamics lies in technical challenges. Various methodologiesexist for their investigation, including ex situ non destructive extraction of plants from theirsubstrate for root VOC analysis (emi tted VOCs) VOCs), or root tissue grinding for VOC profiling VOC scontained ther ein)ein). In situ approaches encompass static methods such as Solid PhaseMicroextraction (SPME) (placed in an inert tube) and dynamic techniques like DynamicHeadspace Sampling (DHS), employing either air extraction (pull) or injection (push) forsampling (or both in push pull device) device). The heterogeneous and complex nature of soil poseschallenges in identifying the precise origins of sampled VOCs, which may emanate frombacterial, fungal, root, insect, or organic matter sources. Furthermore, sampling efficacy iscontingent upon soil physicochemical parameters such as pH, temperature, and pore size .While controlled environment studies or inert substrate replacements (e.g. glass beads) offerexperimental control, they may deviate from ecological realism. We will present the advantagesand disadvantages of the different strategies, indicating which scientific questions they are bestsuited to answer. Additionally, we showcase home made devices developed in our laboratory,designed to sample belo w ground VOCs and elucidate their role in plant plant interactions orallelopathic phenomena

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    Conference
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    Conference

    المساهمون: Bughin, Arthur, Dossogne, Gaëlle, Desjardins, Alex, Kokah, Essomandan Urbain

    المصدر: 30th General Meeting- Why Grassland?, Leeuwarden, Netherlands [NL], 09/06/2024 - 13/06/2024

    وصف الملف: 1

    Relation: Impact of integrated crop livestock farming systems (ICLS) on the soil microbial activity

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    Conference
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    Conference
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    Conference
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    Conference

    المصدر: Terra Innovation Day 2024, Gembloux, Belgium [BE], 22 Mai 2024

    وصف الملف: 1

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    Conference

    المساهمون: TERRA Research Centre. Gestion durable des bio-agresseurs - ULiège

    المصدر: 75th International Symposium on Crop Protection, Ghent, Belgium [BE], 21 May 2024

    Relation: Beyond the smell: evaluation of wireworm potato varietal preference associated with tuber volatile emissions, palatability, and larval fitness

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    Conference

    المصدر: 75th International Symposium on Crop Protection, Jubilee edition, Gand, Belgium [BE], 24 Mai 2024

    وصف الملف: 1

    Relation: EXTRABARK PROJECT: Towards a reinforced circular economy valorization of wood bark by-products by the extraction of valuable molecules as an alternative to synthetic products in agronomy and wood protection.

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    Conference
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    Conference
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    Conference

    المصدر: 75th International Symposium on Crop Protection, 21 mai 2024

    Relation: The Laboratory of Chemistry of Natural Molecules (LCMN) has long been dedicated to the extraction, characterization, and utilization of plant secondary metabolites for applications in agronomy, with a special focus on essential oils. Plant extracts or pure compounds extracted from plants are known as botanicals and are indeed being increasingly employed in various sectors. Among these, their valorization as biopesticides in agronomy addresses a wide spectrum of applications including herbicidal, fungicidal, insecticidal, bactericidal, virucidal, and nematicidal purposes. Numerous compounds, either isolated or derived from more complex plant extracts, contribute to the formulation of these botanicals which offer several advantages, such as a generally low toxicity to users and consumers, a minimal ecotoxicity, and a good biodegradability. However, while their activity can sometimes rival that of conventional biocides originating from synthetic chemistry, this is not always the case.In this presentation, we will outline the advantages and disadvantages of these botanicals and engage in a discussion on their sustainability. Many questions could indeed be raised about their use, such as:- Should agricultural land be utilized to grow plants for protecting other plants?- Is it necessary to excessively harvest naturally growing plants to produce essential oil for a use in the formulation of biopesticides?- Should wood or other fossil energy sources be used in tropical regions to distill plants in order to produce essential oils which will be used for the protection of cultivated plants in temperate environments?In addressing these considerations, the LCMN explores various approaches.- The use of by-products such as bark or the use of invasive tropical plants as starting plant material. - The direct use of whole plant parts rather than the use of essential oils.- The co-cultivation of essential oil plants in horticultural plots, protecting consumable plants from insect pests and subsequently producing essential oil for additional income.- The study of the variability in the composition and therefore the biological activities of essential oils.- The study of induced allelopathy traits where plants produce their own metabolites reducing weed germination and growth.- The use of in vitro culture to produce targeted secondary metabolites.The use of plants to protect other plants through the valorization of "botanicals" is a fascinating subject that draws on various disciplines, with potential applications both in North and South countries. However, a substantial journey lies ahead to gain an in-depth understanding of the mechanisms at play and develop sustainable valorization strategies to replace conventional pesticides with bio-based solutions.

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    Book