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Project News 06.2004

A new whitefly species emerges as
a pest of cereals in Central America

Projects :: Whiteflies as pests in tropical highlands
:: Whiteflies as virus vectors in mixed cropping systems
:: Whiteflies as vectors and pests in cassava

Whiteflies as vectors of viruses in mixed cropping systems in the tropical lowlands of Mexico, Central America and the Caribbean

Geographical focus :: Mexico, Guatemala, Honduras, El Salvador, Nicaragua, Costa Rica, Panama, Belize, Dominican Republic, Haiti, Cuba Start date ::
Completion date ::
Project Name :: Sustainable Integrated Management of Whiteflies as Pests and Vectors of Plant Viruses in the Tropics
Project Leader :: Dr. Pamela Anderson
Subproject Name :: Whiteflies as vectors of viruses in legumes and mixed cropping systems in the tropical lowlands of Central America, Mexico, and the Caribbean. Preliminary studies: Geographical Information System (GIS)
Subproject Description :: Develop GIS ::The development of a geographical information system (GIS) was planned as an activity for subproject 2. To meet this objective, subproject 2 hired a GIS specialist. Establishing a GIS, for purposes of subsequent application to whitefly IPM studies, involves: accessing or creating digitized base maps, agrometerological maps, crop use maps and a series of data maps (e.g. whitefly reproductive host plants, disease incidence and yield loss, distribution of viruses, whitefly species, biotypes and natural enemies; pesticidue use, etc.). Development of a GIS will allow descriptive analysis and lay the basis for more sophisticated regional analytical work in Phase 2 of the Danida project.

Digitized base maps, with municipial-level boundaries, have been created for Mexico, Central America and the Caribbean countries in subproject 2. Agroclimatic maps (rainfall, temperature) for the region have also been accessed. Crop use maps for beans have been accessed for the entire region. However, there is a general lack of information on the geographic distribtuin of horticultural crops in the region. We have started to incorporate the data generated for Mexico by the National Institute of Statistics, Geography and Information (INEGI) for the following crops: beans, tomatoes, peppers, broccoli, squash, melon, cucumber, watermelon, soybean, and tobacco. We are exploring the availability of similar data sets from other countries in the region.

A biological data base for the distribution of geminiviruses, whitefly species and biotypes, natural enemies, and yield/economic losses is being set up. The GIS interface for the base maps and biolotical data has already been established.

Critical Area Analysis ::
Once the GIS is developed and the biological databases imported, it will be possible to use overlay methodologies to conduct a critical area analysis. Critical area analysis involves creating classifications for each map, assigning numerical values to the various classifications, combining values and crating a product map that integrates information from the individual maps. This analysis should indicate and prioritize critical areas, or hot spots, where intensive characterization and basic studies, including epidemiological field studies, should be carried out in Phase 2 of the Danida Project.
Project Leader :: Dr. Francisco Morales / Centro Internacional de Agricultura Tropical
Donor Partner :: Danish International Development Agency - DANIDA
Partner institutions
and collaborating professionals ::


Centro Internacional de Agricultura Tropical - CIAT
Dr. Francisco Morales
Dr. Steffen Schillinger


Danmarks Jordbrugs Forskning (Danish Institute of Agricultural Sciences) - DIAS
Dr. Niels Holst

United States

Harvard University
Dr. Richard Levins

Dissemination Outputs ::  
Keywords :: Geographical Information System; datasets; bean (Phaseolus vulgaris); tomato (Lycopersicon esculentum); peppers (Capsicum annuum and Capsicum frutescens); broccoli (Brassica oleracea var botrytis), squash (Cucurbitaceae), melon (Cucumis melo), cucumber (Cucumis sativus), watermelon (Citrullus lanatus), soybean (Glycine max), tobacco (Nicotiana tabacum), Mexico, Guatemala, Honduras, El Salvador, Nicaragua, Costa Rica, Panama, Belize, Dominican Republic, Haiti, Cuba
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