Le contrôle de la constitutionnalité des lois et des décrets en Belgique : fonction juridictionnelle ou politique ?

Dumont, Hugues

doi:10.4000/books.pusl.7535

Cited by 2 publications

(2 citation statements)

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“…In fact, milder winter and warmer spring may increase the activity and population of Anaceratagalliae earlier in the season when infected plants will express severe symptoms. The second reason can rely on agricultural practices: there has been an increase in the number of producers in Belgium and Europe who are cultivating a wide range of plant species (20-45) over a limited area (< 2.5 ha) (Dumont et al, 2017). These producers often promote sustainable farming, diversity, natural regulation of pests and contact with their consumers, such as Community Supported Agriculture (Dumont et al, 2017, Boeraeve et al, 2020, Tamburini et al, 2020.…”

Section: Discussionmentioning

confidence: 99%

“…The second reason can rely on agricultural practices: there has been an increase in the number of producers in Belgium and Europe who are cultivating a wide range of plant species (20-45) over a limited area (< 2.5 ha) (Dumont et al, 2017). These producers often promote sustainable farming, diversity, natural regulation of pests and contact with their consumers, such as Community Supported Agriculture (Dumont et al, 2017, Boeraeve et al, 2020, Tamburini et al, 2020. The presence of PhCMoV was mainly detected in this type of structure (Temple et al, submitted).…”

Section: Discussionmentioning

confidence: 99%

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Biological characterization of an emergent virus infecting vegetables in diversified production systems: physostegia chlorotic mottle virus

Temple

Blouin

Boezen

et al. 2023

Preprint

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With the emergence of high throughput sequencing (HTS) technologies, the discovery of new plant viruses has outpaced their biological characterization. However, it is crucial to understand the biology of these viruses to evaluate the risks they pose for the production of crops and natural ecosystems and to manage them properly. In 2018, Physostegia chlorotic mottle virus (PhCMoV) was detected in Austria in a Physostegia plant (Lamiaceae) using HTS, and subsequent prepublication data sharing associated the presence of the virus with severe fruit symptoms on important crops like tomato, eggplant, and cucumber across nine European countries. This discovery led to a collaborative effort to understand better the virus's genetic diversity, host range, symptomatology, and distribution. Still, specific knowledge gaps remained. In this study, the authors address these gaps by examining the transmission mode, prevalence, and disease severity of PhCMoV. Bioassay and field survey confirmed the causal association between the presence of the virus and symptoms on tomato and eggplant. The investigation also mapped out the historical and geographic footprint of the virus, spanning back 30 years and including a new location, Switzerland. Based on field survey, PhCMoV was found to naturally infect 11 new host plant species across seven families, extending the host range of PhCMoV to 20 plant species across 14 plant families. Greenhouse assays with mechanical inoculation showed that yield losses could reach 100% depending on the phenological stage of the plant at the time of infection. The study also identified a polyphagous leafhopper species (Anaceratagallia sp.) as the natural vector of PhCMoV. PhCMoV was widespread in diversified vegetable farms in Belgium where tomato is grown in soil, occurring in approximately one-third of such farms. However, outbreaks were sporadic and it can be suggested that they were associated with specific cultural practices, such as the cultivation of perennial plants in tomato tunnels that can serve as a host for both the virus and its vector. To further explore this phenomenon and better manage the virus, studying the ecology of the Anaceratagalliae vector would be beneficial.

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