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Résultats 2041-2050 de 2,193
Citrus and banana production in Trinidad and Tobago
1987
Persad, C. (Ministry of Agriculture, Lands and Food Production, Centeno (Trinidad and Tobago). Central Experiment Station)
A citrus rehabilitation programme is underway to restore abandoned estates through weed control, epiphyte and parasitic phanerogam removal, pruning, fertilization and improved drainage. Phytosanitary methods of control of Moko disease (Pseudomonas solanacearum race 2) and Yellow Sigatoka (Mycosphaerella musicola) of bananas are listed. Virus indexing of citrus cultivars has been initiated and research into tissue culture of banana plants started
Afficher plus [+] Moins [-]Current strategies for Moko control in Grenada: technical and logistical constraints
1987
Hunt, P. (Grenada Banana Cooperative Society, St. George's (Grenada). Moko Control Programme)
Moko control in Grenada by eradication of affected and adjacent (buffer zone) mats is discussed. The major constraints to the programme are poor reporting of disease occurrence, inadequate size of buffer zone, need for frequent re-visits to affected farms, uncertainty over the recommended length of the fallow period, and inadequate supplies of Moko-free planting material
Afficher plus [+] Moins [-]Improving citrus production in Surinam through control of citrus tristeza and citrus exocortis viruses
1987
Klas, J.E. (Agricultural Experiment Station, Paramaribo (Suriname))
Of the citrus diseases occurring in Surinam, fungal, bacterial, viral and those caused by nematodes, tristeza is most important. Trials to identify the best rootstocks to replace the tristeza-susceptible sour orange found Rangpur lime budded with nucellar Alidjan orange best on heavy clay soils. Sunki and King (tangors) are good rootstocks for grapefruit varieties. Research showed tristeza virus transmission by the aphid vector Toxoptera citricidus to be bi-modal (non-persistent and semi-persistent) in Surinam, with the latter more common
Afficher plus [+] Moins [-]Virus diseases of bananas: methods for early detection and characterization of bunchy top associated virus
1987
Iskra, M.L. | Bove, J.M. (Centre de Cooperation International en Recherche Agronomique pour le Developpement, Montpellier (France). Institut de Recherches sur les Fruits et Agrumes)
Describes a purification method for the Bunchy top virus based on density gradient centrifugation which allowed observation of the virus particles for the first time. Thirty micrograms of virus were obtained from 200g of infected leaves. To obtain large amounts of virus for antisera preparation the purification procedure has to be improved
Afficher plus [+] Moins [-]Producing disease-free citrus plants: the Corsican experience
1987
Vanniere, H. (Institut de Recherches sur les Fruits et Agrumes, San Nicolao (France))
Indexing, the ELISA test, Spiroplasma citri culturing, nucellar selection and shoot tip grafting are procedures used in Corsica to maintain virus-free budwood. Corsica has managed to remain free of the major diseases of citrus: Tristeza, Phoma tracheiphila (mal secco), Spiroplasma citri (stubborn) greening and Xanthomonas citri (citrus canker)
Afficher plus [+] Moins [-]Migration and rural welfare: The impact of potential policy reforms in Europe Texte intégral
2013
Wouterse, Fleur Stephanie
Commercialising organic agriculture. Does it improve household food security? A case study from south-western Uganda Texte intégral
2007
Aigelsperger, L | Njuki, Jemimah | Hauser, M.
Integrated pest management in Trinidad and Tobago
1995
Jones, Mona T. (Ministry of Agriculture, Land and Marine Resources, Centeno (Trinidad and Tobago). Research Division)
This country paper tabulates IPM projects, status and sources funding in Trinidad and Tobago in 1994. The projects listed are located in the Ministry of Agriculture (MoA), Caroni (1975) Limited, the National Institute for Higher Education, Research, Science and Technology (NIHERST), the International Institute of Biological Control (IIBC) and the University of the West Indies (UWI). Facilities available for IPM work at the subject institutions are also listed.
Afficher plus [+] Moins [-]Selection and strategic use of multipurpose forage germplasm by smallholders in production systems in the Central American hillsides Texte intégral
2003
Schmidt, A. | Peters, Michael
Soil crusting and sealing in the Andean hillsides of Colombia and its impact on water infiltration Texte intégral
2003
Thierfelder, Christian L. | Stahr, Karl | Amézquita Collazos, Edgar
