  We propose a strategy based on the site-bond percolation to minimize the
propagation of \textit{Phytophthora} zoospores on plantations, consisting in
introducing physical barriers between neighboring plants. Two clustering
processes are distinguished: i) one of cells with the presence of the pathogen,
detected on soil analysis; and ii) that of diseased plants, revealed from a
visual inspection of the plantation. The former is well described by the
standard site-bond percolation. In the latter, the percolation threshold is
fitted by a Tsallis distribution when no barriers are introduced. We provide,
for both cases, the formulae for the minimal barrier density to prevent the
emergence of the spanning cluster. Though this work is focused on a specific
pathogen, the model presented here can also be applied to prevent the spreading
of other pathogens that disseminate, by other means, from one plant to the
neighboring ones. Finally, the application of this strategy to three types of
commercialy important Mexican chili plants is also shown.
