UÏld and domestic Triatoma b+stans from the Cochabamba region of Bolivia were virtually identical at 19 gene loci coding for enzymes. ìio allele \,.as distinctive of either the wild or the domestic populations. Hence, there is no evidence that the 2 populations are different species. Domestic populations separated by 20 km shoL%.ed statistically significant ' differences in allelic frequencies: this is compatible' with the hypothesis of other authors that migrations of T. iq'2stans are limited Ghen feeding conditions are satisfactory. Fifteen trypanosomatid stocks isolated from wild T. i?zJ>:taiis \,.ere shown by isozyme analysis to be Tr$anosonia rruri. This provides evidence that wild T. i+staizs are involved in the Chagas' disease cycle. The T. crui isozymic strains from wild T. infpjtans were genetically similar to those isolated from domestic T. i+vtans in the same region. Thissupports the hypothesis that there is no speciation between wild and domestic T. injjtai::. and that wild and domestic T. crud cycles may overlap in this region.

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Producing large quantities of high quality minitubers at low cost is essential for an economically viable supply of seed potatoes. Here we systematize the technical and economic aspects of aeroponics and provide a benchmark comparison of this technology with other mini-tuber production systems as developed in Latin America: conventional, semi-hydroponics, and fiber-cement tiles technology. Research methodologies included: 3-year registration of cash flows and production registers of aeroponics, economic and technical surveys, in-depth inquiry with managers of technologies. Results show that aeroponics as promoted by

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