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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
Показать больше [+] Меньше [-]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
Показать больше [+] Меньше [-]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
Показать больше [+] Меньше [-]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
Показать больше [+] Меньше [-]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)
Показать больше [+] Меньше [-]Migration and rural welfare: The impact of potential policy reforms in Europe Полный текст
2013
Wouterse, Fleur Stephanie
Improving banana phytosanitation and banana production through shoot tip culture
1987
Ganry, J. (Centre de Cooperation International en Recherche Agronomique pour le Developpement, Montpellier (France). Institut de Recherches sur les Fruits et Agrumes)
The advantages of shoot tip planting material in banana production are briefly outlined. The production scheme and ongoing research at IRFA/Vitropic are summarised
Показать больше [+] Меньше [-]Improved citrus production through improved phytosanitation in Belize
1987
Garcia, F.P. (Citrus Growers' Association, Dangria (Belize))
Describes the phytosanitary measures in force and those that are planned. These include provision of virus-free registered mother trees to nurseries, registration of citrus nurseries, regulation of seed and imports, and inspection of farms and nurseries
Показать больше [+] Меньше [-]Production of virus-free citrus materials: the California experience
1987
Reuther, W. (California University, Riverside (USA))
Outlines the history and objectives of the California Citrus Clonal Protection Program (CCPP) which conducts research and is a primary source of disease-free budwood of desirable true-to-type citrus scion and rootstock varieties designed to exclude graft transmissible diseases (virus and virus-like)
Показать больше [+] Меньше [-]Biology of Mycosphaerella (Sigatoka): preliminary tests for the selection of resistant varieties
1987
Mourichon, X. (Centre de Cooperation International en Recherche Agronomique pour le Developpement, Montpellier (France). Institut de Recherches sur les Fruits et Agrumes)
Research is directed towards study of host-parasite relations. The 3 Sigatoka leaf spot pathogens, Mycosphaerella musicola (Yellow Sigatoka), M. fijiensis (Black Leaf Streak) and M. fijiensis difformis are compared morphologically and pathogenically. Species identification by electrophoresis on acrylamide gels has been studied, the species also differ in host range, geographical range, symptoms and distribution of lesions. Early tests of susceptibility of plantlets from meristem culture suggest that they react to infection in the same way as observed in the field
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