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close this bookAgricultural Development and Vector-Borne Diseases (FAO - HABITAT - UNEP - WHO, 1996, 91 p.)
close this folderTopic G: Cultivation practices
View the documentList of slides
View the documentG.1 Riceland preparation with oxen, Africa
View the documentG.2 Riceland preparation with water buffaloes, Philippines
View the documentG.3 Deep ploughing by tractor, Malaysia
View the documentG.4 Aerial infrared photograph of a riceland system, Texas, USA
View the documentG.5 Rice harvesting equipment, Texas, USA
View the documentG.6 Equipment tire racks in rice field, Texas, USA
View the documentG.7 Aerial photograph of riceland study site, Texas, USA
View the documentG.8 Colour infrared photograph of levees and tire tracks, Texas USA
View the documentG.9 Oviposition features in ricelands, Texas, USA

G.3 Deep ploughing by tractor, Malaysia

Slide G.3 Deep ploughing by tractor, Malaysia

In many rice growing areas, the past two or three decades have seen a dramatic displacement of draught animals by tractors, as illustrated in this slide from Malaysia. Such mechanization makes it practical and economic to put marginal lands under cultivation. The ensuing ecological changes and the creation of monocultures (habitat simplification) can have far-reaching consequences for the health status of local communities. Farm mechanization will also change people’s lifestyles, possibly increasing the mobility of migrant and seasonal labour. In relation to rice cultivation, mechanization is likely to be associated with increased areas under flooding and more vector breeding opportunities. The introduction of upland or “dry” rice varieties will, on the other hand, reduce such risks. The recent trend of broadcasting rather than transplanting rice (in countries were manual labour is becoming too expensive) is also likely to have a beneficial effect with respect to vector-borne disease risks.