We develop a bioeconomic model to investigate postharvest food quality cont
rol. The trade-off between costly intervention and economic damage is studi
ed when economic parameters, such as fixed and variable costs of control, a
nd biological parameters, such as the stochastic rate of contamination and
the growth rate of contaminants, are altered. The model can accommodate alt
ernative environmental settings. Regulations through random inspections and
through terminal inspections are analyzed. As an illustration, optimal act
ions to control insect infestations in stored wheat are simulated and found
to be in accord with commercial practice.