Plant health

Scientists from INRAE and ANSES have been studying changes in field margin vegetation on 500 agricultural plots in mainland France, to understand how climate change and farming practices are affecting these plants. Their results, published in Ecology Letters, show that in 10 years the average temperature in these plots has risen by 1.2°C and soil moisture has fallen by 14%. The work shows that the plant communities in field margins have changed as a result, with more species tolerant to heat and aridity to the detriment of ruderal species (i.e. those able to withstand the disruption associated with farming practices). Climate change mitigation practices, such as plant cover and agroforestry, or reducing the use of agricultural inputs, would help preserve the ability of this biodiversity to adapt.

Neonicotinoids have long been used to combat aphids in crops Repeated use of these active substances has led to the selection of insects capable of resisting them. A study on the green peach aphid carried out by ANSES in collaboration with a research scientist from the University of Exeter (UK), revealed that resistance was based on two distinct mechanisms in this species. One is specific to the product's mode of action and the other is based on its degradation. The scientists' findings show that interactions between resistance mechanisms are possible, which is vital knowledge for adapting and adjusting control strategies.

The occupations most exposed to the stinging hairs of processionary caterpillars are lumberjacks, silviculturists, forestry operators and workers maintaining or developing green spaces. These are the findings of the CheniPRO workplace study conducted by ANSES in partnership with the Agricultural Mutual Insurance Scheme (MSA). It is essential that workers wear suitable protective equipment to prevent the risks of exposure.

The International One H Symposium will bring together players in the animal, environmental and human health sectors for a comprehensive review of the transmission of infectious diseases from animals to humans using a “One Health” perspective.

New genomic techniques (NGTs) offer a vast range of applications, especially in the breeding of cultivated plants. Similar to genetically modified organisms (GMOs), but nevertheless distinct from transgenic plants, these applications require careful consideration with a view to their possible arrival on the European market. Within the scope of its missions, ANSES conducted an expert appraisal of the challenges associated with these NGTs in order to provide the authorities and stakeholders with insights for the current discussions on changes to the European GMO framework. The Agency proposed adapting the assessment of these plants on a case-by-case basis, using a graduated approach, and recommended a comprehensive monitoring scheme. In addition to the health challenges, ANSES also identified various socio-economic motivations and concerns associated with NGTs in agriculture, and called for future decisions to be based on a democratic debate that goes beyond the risks and considers all the issues at stake.

Nematodes are parasitic worms, some species of which cause major crop losses. To prevent their spread, it is important to disinfect organic waste – plants, soil and sludge – and water that have been in contact with these pests before discarding or reusing them. Scientists from ANSES's Plant Health Laboratory have assessed the effectiveness of various disinfection methods enabling this waste to be recovered and reused as part of the circular economy.

In aphids of the species Myzus persicae , there is a low rate of gene flow for insecticide resistance between the populations that colonise different plant species. This discovery made by scientists from ANSES, INRAE and the University of Montpellier may lead to a new approach to the strategies implemented to control the development of resistance to these pesticides.

The Ouest Valorisation TTO and ANSES are signing a partnership agreement today. Its goals are to add value to the research results produced by ANSES's laboratories in the Brittany and Pays de la Loire Regions and develop innovation stemming from their work.