Tomato leaf curl New Delhi virus (ToLCNDV) is now emerging in the Mediterranean Basin, starting from Spain in 2012. It has been observed for the first time in France in 2020 in Gard and Bouches-du-Rhône. Mediterranean ToLCNDV is a bipartite begomovirus, causing leaf curl disease mainly in zucchini and others cucurbits, and genetically distinct from Asian (Indian)-ToLCNDV that has a broader host range. The cryptic species of whitefly Bemisia tabaci is the main insect vector of ToLCNDV while mechanical inoculation is also possible. Previous studies indicate that the Mediterranean clade represents a homogenous population, probably originating from a single introduction. We established a suitable protocol of inoculation and performed biological and molecular characterization of the French isolates in order to estimate their risks of emergence and their potential agronomic impact. Symptom observation of French ToLCNDV isolates on melon and zucchini showed two different types so-called “severe” and “recovery”. French ToLCNDV was found to be transmissible by Bemisia tabaci as expected but not by the greenhouse whitefly Trialeurodes vaporariorum. Host range analysis in experimental conditions suggest that Bryony and Tomato are susceptible to French and Spanish ToLCNDV and may constitute virus reservoirs, what should be taken into consideration for virus control. Our results expand the knowledge on this emerging virus and offer perspectives for shaping the future plant disease management.
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Agricultural run-off and subsurface drainage tiles transport a significant amount of nitrogen and phosphorus leached after fertilization. alchemia-nova GmbH in collaboration with University of Natural Resources and Life Sciences, Vienna developed two multi-layer vertical filter systems to address the agricultural run-off issue, which has been installed on the slope of an agricultural field in Mistelbach, Austria. While another multi-layer addressing subsurface drainage water is implemented in Gleisdorf, Austria. The goal is to develop a drainage filter system to retain water and nutrients. Both multi-layer filter systems contain biochar and other substrates with adsorption properties of nutrients (nitrogen, phosphorus). The filter system can be of practical use if an excess of nutrients being washed out is of concern in the fields of the practitioner by keeping the surrounding waters clean. This approach may result in economic value by re-using the saturated biochar as fertilizer and improving the soil structure, thus increasing long-term soil fertility. Link: https://wateragri.eu/a-bio-inspired-multilayer-drainage-system/
This project has received funding from the European Union’s Horizon 2020 research and innovation program under Grant Agreement No 858735This project has received funding from the European Union’s Horizon 2020 research and innovation program under Grant Agreement No 858735. FACTSHEET NANOCELLULOSE MEMBRANES FOR NUTRIENT RECOVERY Key information Functionalized nanocellulose membranes can take up nitrate and phosphate. These membranes can be put in a water treatment unit. As the membranes are biobased, degradable materials, they can after use be added to the soil, thus returning the leached nutrients back for their original purpose providing fertilizers (nutrient recycling).
Because variables such as temperature and humidity have a profound effect on the activity of crop pests, diseases and natural enemies, the ability to monitor environmental conditions within a crop has always been important for crop protection.