Evaluation of different options: host plant resistance, weed management, fertilization for the development of an integrated pest management strategy for the sweet potato weevil in Burkina Faso

The sweet potato weevil (SPW) (Cylas puncticollis) is a destructive pest feeding on the sweet potato in Burkina Faso. This weevil causes severe damage to the tuber, and the infested tuber is unsuitable for human consumption or animal feed. This problem calls for effective control management, especially for non-chemical approaches. A field experiment was carried out from 2012 to 2015 with the aim to develop management methods. Different control methods, including host-plant resistance, weeds management and crop fertilization, were tested. The results showed that two varieties, Zappalo-1 and Resisto were free of any SPW damage (0%). Similarly, when plots were not weeded tubers of the BF11 variety were free of any SPW damage (0%). Finally, the combination of manure and mineral fertilizer significantly reduced the damage due to the SPW to score as low as 1 compare to 3.5 in the absence of manure. From the current study, it can be concluded that an integrated approach combining resistant varieties, good weeding practices and fertilizer application could be implemented to control the SPW in Burkina Faso

CARI'96 : actes du 3ème colloque africain sur la recherche en informatique = CARI'96 : proceedings of the 3rd African conference on research in computer science

Cet article présente une méthode de synthèse automatique de documents enregistrés sur support électronique. Le système proposé a pour objectif de mettre à la disposition d'un utilisateur un ensemble de moyens (les opérations de synthèse) qui lui permettent d'assimiler de façon personnalisée le contenu d'un document. La méthode utilisée repose sur une représentation sémantique adéquate du document à étudier. Cette représentation intègre aussi bien les concepts inhérents au thème traité par le document que l'expertise et les connaissances opératoires nécessaires pour manipuler intelligemment le document. Les opérations de base offertes par ce système sont spécifiées à l'aide de la notion d'abstraction. Elles permettent de construire une représentation virtuelle du document de base adaptée aux contraintes d'acquisition, aux objectifs et au profil de l'utilisateur. Le document de base est enregistré sous forme d'hypertexte. (Résumé d'auteur

CARI'96 : actes du 3ème colloque africain sur la recherche en informatique = CARI'96 : proceedings of the 3rd African conference on research in computer science

The use of remote sensing and Geographic Information System (GIS) for the needs of industrial plantations management, has occupied more and more important place during the last years. In the case of the hevea culture, this can be explained by the need expressed by agronomists to achieve development, inventory, maintenance and farming operations, on the plantations, by means of aerial images, topographic and descriptive data. Most of these operations integrate decisional procedures using models from Statistics, Operational Research and Artificial Intelligence. The DSS presented here has been designed in this context. Its main particularity rest on the fact that most of the decisional procedures implemented need a simultaneous use of the three types of data cited above. Our approach uses a modelization of the user's conceptual space in the shape of a state graph. A session in the system may be viewed as a partial exploration of that graph. The control of this exploration is completely left to the user. Furthermore the system provides the user with a set of operators allowing him to generate new states from the current one, and a set of functions based on some decisional models for the evaluation of the generated states. (Résumé d'auteur

Evaluation of Different Options: Host Plant Resistance, Weed Management, and Fertilization for the Development of an Integrated Pest Management Strategy for the Sweet Potato Weevil in Burkina Faso

The sweet potato weevil (SPW) (Cylas puncticollis) is a destructive pest feeding on the sweet potato in Burkina Faso. This weevil causes severe damage to the tuber, and the infested tuber is unsuitable for human consumption or animal feed. This problem calls for effective control management, especially for non-chemical approaches. A field experiment was carried out from 2012 to 2015 with the aim to develop management methods. Different control methods, including host-plant resistance, weeds management and crop fertilization, were tested. The results showed that two varieties, Zappalo-1 and Resisto were free of any SPW damage (0%) . Similarly, when plots were not weeded tubers of the BF11 variety were free of any SPW damage (0%). Finally, the combination of manure and mineral fertilizer significantly reduced the damage due to the SPW to score as low as 1 compare to 3.5 in the absence of manure. From the current study, it can be concluded that an integrated approach combining resistant varieties, good weeding practices and fertilizer application could be implemented to control the SPW in Burkina Faso