  A number of top down bio-control models have been proposed where the
predators' efficacy is enhanced via the provision of additional food (AF).
These can lead to infinite time \emph{blow-up} of the predator . Predator
interference, predator competition, refuge, pest defense and cannibalism have
been proposed to achieve pest extinction, while keeping the predator population
bounded, but entail \emph{quadratic} or higher order damping terms. Thus an AF
model with monotone pest dependent functional response, devoid of these
mechanisms, cannot yield the pest extinction state.
  In the current manuscript we propose a novel patch driven bio-control model,
with monotone pest dependent functional response. Here a predator is introduced
into a ``patch" such as a prairie strip with AF, and then disperses into a
neighboring ``patch" such as a crop field, to target a pest. Assuming only
\emph{linear} dispersal in the predator, we show, (i) blow-up in the predator
can be prevented in both the prairie strip and the crop field, (ii) the pest
extinction state is attainable in the crop field, (iii) the AF model with patch
structure can keep pest densities lower than the AF model without patch
structure and/or the classical top-down bio-control model, (iv) the AF model
with patch structure possesses rich dynamics including chaos. In particular,
one observes ``patch specific chaos" - the pest occupying the crop-field can
oscillate chaotically, while the pest in the prairie strip oscillates
periodically. We discuss these results in light of bio-control strategies that
would utilize prairie strips.
