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A survey of weeds and weeding practices was carried out by a team of agricultural economists and agronomists on 283 farms in 5 cassava-growing regions of Colombia at 3 times during a cropping season. From 71-78 percent of the weed species present were broad- leaved species. As cassava grew older,...


Doll, J.Pinstrup-Andersen, PerDíaz, R.O.[An agro-economic survey of the weeds and weeding practices in cassava (Manihot esculenta Crantz) in Colombia]An agro-economic survey of the weeds and weeding practices in cassava (Manihot esculenta Crantz) in Colombia

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...


Lozano, J.C.Byrne, D.Bellotti, Anthony C.[Cassava/ecosystem relationships and their influence on breeding strategy]Cassava/ecosystem relationships and their influence on breeding strategy

The importance of cassava cultivation in relation to other agricultural products of cassava-producing countries is briefly analyzed. The production, area and yields of cassava cultivation in all the production zones, and especially L.A. countries, were studied with the purpose of evaluating the i...

Se analiza brevemente la importancia del cultivo de la yuca en relacion con otros productos agricolas de los paises productores de yuca. Se estudia la produccion, el area y el rendimiento del cultivo de la yuca en todas las zonas productoras y en especial en paises latinoamericanos, con el propos...


Díaz Duque, R.O.[Caracteristicas de la produccion de yuca en el mundo con enfasis en America Latina]Caracteristicas de la produccion de yuca en el mundo con enfasis en America Latina

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.Byrne, D.Bellotti, Anthony C.[Influencia del ecosistema en las estrategias del mejoramiento genético de la yuca]Influencia del ecosistema en las estrategias del mejoramiento genético de la yuca

Aspects related to pest management in cassava are discussed: (1) favorable factors involved insect/plant/environment interactions; (2) characteristics of insect survival; (3) integrated, biological control and pest management. On the basis of research conducted by CIAT on Erinnyis ello, a managem...

Se discuten aspectos relacionados con el manejo de plagas en la yuca: 1) factores favorables involucrados en la interaccion insecto/planta/medio ambiente; 2) caracteristicas de supervivencia de los insectos; 3) control integrado, biologico y manejo de plagas. Con base en las investigaciones reali...


Bellotti, Anthony C.Reyes Q., Jesús AntonioArias V., BernardoVargas H., Octavio[Manejo de plagas en yuca]Manejo de plagas en yuca

The objectives of the diagnosis of bean production are to (1) contribute criteria for the design and completion of on-farm trials of the new bean technology and (2) to take information to research centers that helps define bean research priorities. A summary is presented of the methodology sugges...

Los objetivos del diagnostico de la produccion de frijol son 1) aportar criterios para diseno y ejecucion de ensayos de nueva tecnologia de frijol en fincas de agricultores y 2) llevar informacion a los centros de investigacion que ayude a definir prioridades de investigacion en frijol. Se presen...


Ruiz de Londoño, NorhaPachico, Douglas H.[Metodologia del diagnostico de la produccion de frijol]Metodologia del diagnostico de la produccion de frijol

Activities of international cooperation during 1981 are listed. Training courses in cassava production, tissue culture, physiology, and in advanced research for postgraduate work were attended by 38 professionals from 16 countries. From 1973 to 1981 cassava hybrid seeds have been distributed in L...

Se presentan las actividades de cooperacion internacional durante 1981. Se dictaron cursos de capacitacion cientifica sobre produccion de yuca; cultivo de tejidos; fisiologia; y especializacion de posgrado a 38 profesionales de 16 paises. Desde 1973 hasta 1981 se ha distribuido semilla hibrida en...


International Center for Tropical Agriculture[Cooperacion internacional]Cooperacion internacional

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