Studies on the translocation of the causal agent of cassava bacterial blight (considered to be a biotype of Xanthomonas manihotis) within the host tissues showed that this pathogen moves mainly through the xylem tissue. The primary stem symptoms appear on the green portion of the stem, but their ...
Takatsu, A.
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Lozano, J.C.
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[Translocacion del agente causal del anublo bacterial de la yuca (Manihot esculenta Crantz) en los tejidos del hospedero]
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Translocacion del agente causal del anublo bacterial de la yuca (Manihot esculenta Crantz) en los tejidos del hospedero
Bacterial blight of cassava is a serious problem in Central and South America and has been observed in parts of Africa. Symptoms include leaf spotting, wilting, dieback, gum exudation on young shoots, and vascular discoloration in mature stems and roots of susceptible cultivars. Dispersal by rain...
The reasons an integrated pest and disease control in cassava is justified are analyzed. Some cultural practices are listed that would lessen the problems caused by negative production factors within an ecosystem and would give high stable yields. Recommendations are given to maintain and enrich ...
Se analizan las razones que justifican un control integrado de plagas y enfermedades de la yuca. Se enumeran algunas practicas culturales que reducirian los problemas ocasionados por los factores negativos de la produccion en un ecosistema y originarian altos rendimientos estables. Se presentan r...
Lozano, J.C.
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Bellotti, Anthony C.
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[Control integrado de enfermedades y pestes en la yuca (Manihot esculenta Crantz)]
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Control integrado de enfermedades y pestes en la yuca (Manihot esculenta Crantz)
Aspects related to breeding programs in cassava, the impact of past strategies and exptl results related to them are discussed. Even though sources of resistance have been identified for the majority of the diseases and pests, in addition to tolerance to adverse edaphic and climatic factors, it i...
Se discuten ampliamente aspectos relacionados con los programas de mejoramiento genetico de la yuca, el impacto de estrategias pasadas y los resultados experimentales relacionados con estas. Aunque se han identificado fuentes de resistencia a la mayoria de las enfermedades y plagas, ademas de la ...
Lozano, J.C.
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Byrne, D.
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Bellotti, Anthony C.
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[Influencia del ecosistema en las estrategias del mejoramiento genético de la yuca]
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Influencia del ecosistema en las estrategias del mejoramiento genético de la yuca
The different alternatives for disease control in cassava, registered as efficient and considered as possible candidates for inclusion in technological packages for cassava cultivation, are summarized. Certain specific characteristics of cassava and its cultivation that should be considered when ...
Se resumen las diferentes alternativas que para el control de enfermedades en yuca se han registrado como eficientes y que podrian tenerse en cuenta al proyectar paquetes tecnologicos para la produccion de ese cultivo. Se enumeran ciertas caracteristicas especificas de la yuca y su cultivo que se...
Cassava vegetative material is distributed by sending seedlings obtained from meristem cultures in test tubes. Although this material is accepted worldwide, losses occur due to seedling weakness and the delay to obtain adult seedlings in the field (normally between 3 and 4 yr). To overcome this p...
Lozano, J.C.
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Laberry, R.
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[Nuevo metodo para transporte de material vegetativo indexado de yuca (Manihot esculenta Crantz)]
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Nuevo metodo para transporte de material vegetativo indexado de yuca (Manihot esculenta Crantz)
A method of rooting shoot tips is described, whereby plants free from cassava bacterial blight were produced. The use of this method, in addition to cultural practices, is proposed for producing pathogen-free foundation stock for a planting material certification program. (AS)
Lozano, J.C.
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Wholey, W
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[A technique for the production of bacteria-free planting stock of cassava (Manihot esculenta Crantz)]
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A technique for the production of bacteria-free planting stock of cassava (Manihot esculenta Crantz)
The different alternatives for disease control in cassava, reported as efficient and that could be taken into account when designing technological packages for cassava production, are summarized. These are cultu-ral control (crop rotation, planting on furrows, elimination of crop resi-dues, dista...
The main pathological problems of the cassava crop are summarized. Four bacterial diseases have been identified and their causal agents characterized: CBB, angular leaf spot, bacterial stem rot, and bacterial stem gall. Two mycoplasmal problems, witches` broom and antholysis, have been identified...