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Helmut MEISS

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Identifiants chercheurs

Présentation

Since 2013, Dr. Helmut MEISS works as a permanent assistant professor (MCF) in **agroecology** at Lorraine University, Nancy, France. **Current teaching** His teaching activities at *IUT Nancy-Brabois* are focused on theoretical and practical **introductions** to a) **sustainable agriculture**, b) **soil sciences**, c) **weed biology and management** including **botanics**, and d) a variety of **projects** and **agronomic** **surveys** realized with student groups. He leds the DUT-BUT agronomy study program at *IUT Nancy-Brabois*. <https://iutnb.univ-lorraine.fr/fr/page/183/Agronomie.html> **Current research** The aim of his research within the LAE-AGISEM research team is to understand and improve **ecosystem services** in cereal farming systems <http://lae.univ-lorraine.fr/fr/lunite-agisem/controles-biologiques>. Together with his colleagues F. Lasserre-Joulin, O. Therond, A. Rouabah (postdoc 2019-20), E. Stell (PhD-student 2019-22), and H. Lirot (Master student 2022) H. Meiss is interested in **conservation biological control (CBC)** of crop pests such as **aphids** by their **natural enemies** (various arthropod predators and parasitoid wasps) that are **naturally occurring in agroecosystems**. We combine **experimental** and **modeling** approaches. The goal is to contribute to the development of knowledge and **decisions support systems** useful for improving CBC in cereal farming systems. A better understanding und **prediction** of the **temporal dynamics** of these interactions will be useful for strongly reducing or suppressing the use of insecticides by farmers. Our knowledge is still limited concerning **the drivers** **of CBC** including i) temperature, humidity, and other dynamic **whether** parameters varying within and between years, ii) the **landscape composition and spatial configuration** around the fields and iii) the various **cropping systems and practices** and their **temporal succession on the local field and in neighboring fields** in the landscape. They may all influence the **spatio-temporal population dynamics** of crop pests and of their natural enemies, and thus the potentially regulating effects caused by their interactions. <http://lae.univ-lorraine.fr/fr/membre/helmut-meiss-0> **Education and past research** Helmut Meiss obtained a PhD in 2010 conjointly at Burgundy University/INRAE Dijon, France and Gießen University, Germany. During his PhD and post-doc, he worked on **cultural and biological weed management (crop rotation, weed seed predation by natural enemies, crop-weed competition, plant regrowth after cutting of temporary grasslands, soil tillage)**. During his master 2 (2006, INRAE Dijon), he analyzed the **fitness cost of an herbicide resistance** (caused by a point mutation) and the **genetic basis of the phenotypic reduction of these costs** using *Arabidopsis thaliana* and thus got research experiences in evolutionary ecology and genomics*.* During his master 1 (2005, INRAE Dijon), he analyzed the **seed bank ecology** of an invasive annual plant species, *Ambrosia artemisiifolia*.

Publications

xavier-reboud

Variation of post-dispersal weed seed predation according to weed species, space and time

Audrey Alignier , Helmut Meiss , Sandrine Petit , Xavier Reboud
Journal of Plant Diseases and Protection. Special issue, 2008, Special Issue XXI, pp.221-226
Article dans une revue hal-02666717v1
Image document

Postdispersal weed seed predation ranged between 19 to 84% per week following a species preference rank

Audrey Alignier , Helmut Meiss , Sandrine Petit , Xavier Reboud
24. German Conference on Weed Biology and Weed Control, Mar 2008, Hohenheim, Germany
Communication dans un congrès hal-02754466v1

Variation of post-dispersal weed seed predation according to weed species, space and time

Audrey Alignier , Helmut Meiss , Sandrine Petit , Xavier Reboud
24. German Conference on Weed Biology and Weed Control, Mar 2008, Stuttgart-Hohenheim, Germany
Communication dans un congrès hal-02819864v1
Image document

Postdispersal weed seed predation ranged between 19 to 84% per week following a species preference rank

Audrey Alignier , Helmut Meiss , Sandrine Petit , Xavier Reboud
24th German Conference on Weed Biology and Weed Control, Mar 2008, Hohenheim, Germany. Springer, Journal of Plant Diseases and Protection. Special issue pp.1, 2008, Journal of Plant Diseases and Protection. Special issue
Poster de conférence hal-01535071v1