No abstract
Sustainable management and conservation of tropical trees and forests require accurate identification of tree species. Reliable, user-friendly identification tools based on macroscopic morphological features have already been developed for various tree floras. Wood anatomical features provide also a considerable amount of information that can be used for timber traceability, certification and trade control. Yet, this information is still poorly used, and only a handful of experts are able to use it for plant species identification. Here, we present an interactive, user-friendly tool based on vector graphics, illustrating 99 states of 27 wood characters from 110 Amazonian tree species belonging to 34 families. Pl@ntWood is a graphical identification tool based on the IDAO system, a multimedia approach to plant identification. Wood anatomical characters were selected from the IAWA list of microscopic features for hardwood identification, which will enable us to easily extend this work to a larger number of species. A stand-alone application has been developed and an on-line version will be delivered in the near future. Besides allowing non-specialists to identify plants in a user-friendly interface, this system can be used with different purposes such as teaching, conservation, management, and selftraining in the wood anatomy of tropical species.
-We developed an interactive electronic weed identification tool, AFROweeds, and an online network, Weedsbook, for agricultural change agents to aid communication and offer assistance to rice farmers with specific weed problems. We collected quantitative and qualitative data to assess effectiveness and usefulness of these products with potential users. With the online version of AFROweeds, used on an electronic tablet, average weed identification time in the field was 7 min 6 s with 44% successful identifications. Poor mobile network coverage and slow internet were the main reasons for the relative long identification time and low success rate. A second trial was done with the offline version, preinstalled on a tablet. The average identification time was 6 min 34 s, with a success rate of 75%. The online network Weedsbook, established alongside AFROweeds, was assessed by the test users as a useful additional aid, enabling agricultural change agents and agronomists to exchange information or request assistance on all aspects of weeds and weed management. The potential improvements of both products are discussed.Keywords: rice / extension / lowland / sub-Saharan Africa / ICT / network Résumé -Des outils électroniques d'aide à l'identification et à la gestion des adventices du riz en Afrique pour des agents de vulgarisation agricole mieux informés. Afin que les agents de vulgarisation agricole puissent aider rapidement et efficacement les riziculteurs à améliorer leurs pratiques de désherbage, nous avons développé un outil électronique d'identification des adventices du riz, AFROweeds, et un espace collaboratif en ligne, Weedsbook. Nous avons collecté des donnéees qualitatives et quantitatives pour évaluer l'efficacité et l'utilité de ces produits avec des utilisateurs potentiels. Le premier test d'AFROweeds a été mis en oeuvre avec la version en ligne (par 3G), à partir d'une tablette électronique. Le temps d'identification moyen d'une espèce a été de 7 min 6 s avec un taux de réussite de 44 %. Une faible couverture du réseau mobile et la lenteur du réseau internet ont été les principales raisons de la longue durée d'identification et du faible taux de réussite. Le deuxième essai, hors-ligne, a été réalisé avec la version encapsulée, installée sur une tablette. Le temps d'identification moyen a été de 6 min 34 s, avec un taux de réussite de 75 %. Le réseau Weedsbook, établi en plus d'AFROweeds, a été évalué par des utilisateurs
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