Resumo

LOPEZ ORONA, Carlos Alfonso; PENUELAS RTVAS, Claudia Giovanna; ARTEAGA REYES, Tizbe Teresa  e  MARTINEZ CAMPOS, Angel Roberto. Analysis of cleaning-up cost of fungicides in soils used to control Phytophtora infestans in potato crops (Solanum tuberosum). Rev. Int. Contam. Ambient [online]. 2013, vol.29, n.4, pp.295-301. ISSN 0188-4999.

In this study, the pattern of use and cleaning-up costs of fungicides in soils used to control Phytophthora infestans in potato crops were determined in the municipality of Zinacantepec, State of Mexico. In the plots of seasonal agriculture, the excesses of chlorothalonil were 1.13 kg/ha of active ingredient while for metalaxyl and fenamidone were 0.65 and 0.52 kg/ha respectively; this represents the double of excesses applied in plots of irrigation agriculture. It was determined that the minimum cost of cleaning-up one hectare of potato crops is 2.73 million of Mexican pesos (MXN pesos). In the case of plots with a double cycle, where dose of fungicides are employed above the recommended, the maximum spare income during the period of life (15 years) was 2.66 million of MXN pesos. On other hand, the irrigation systems, with double cycles that apply fungicides at levels below the recommended dose, have an average life span of 25 years, during which a real income of 3.27 million of MXN pesos/ha is obtained. This represents an income 18.65 % higher than the one that could be obtained during the life span of plots that apply fungicides above the recommended dose.

Palavras-chave : pattern of use; chlorothalonil; metalaxyl; fenamidone.