Results Ecuador

In Ecuador the Tradeoff Analysis Model has been applied in the Carchi Province in the northern Andes of Ecuador. In the potato-pasture system many pesticides are used, which cause health and environmental problems. The production is as well under pressure due to tillage erosion, which results in the loss of fertile topsoil. Some examples of resulting tradeoff curves between net revenues and pesticide leaching and health risk are shown on this page. An interpolated map of Carbofuran, the main pesticide in the area, has been made, based on the Tradeoff Analysis. This movie shows the result of an increasing potato price on the pesticide leaching in the area.

 

The tradeoff between net returns and Carbofuran leaching shows an increase in leaching with higher net returns. When farmers expect to receive a higher price for their potatoes they are willing to invest more, which results in a higher pesticide use. The points are more or less clustered, each cluster is related with one tradeoff point, which is defined in this case as the potato price. With Integrated Pesticide Management (IPM) a clear reduction in Carbofuran leaching can be reached, as result of more efficient application.

 

Tillage erosion not only decreases the productivity, due to loss of fertile topsoil, but also pesticide leaching increases. The organic matter rich topsoil binds normally part of the pesticide, which prevents leaching to the groundwater.