Kuzmanov D., N. Dimitrov (2009) Forecasting the Necessity of Grain Fumigation during Storage. Czech Journal of Food Science, 27(3): 210-215

According to the simulation models composed for the population growth and feeding damage of the insects: Sitophilus
oryzae (L.), Sitophilus granarius (L.) and Rhizopertha dominica (F.) the populations densities have been determined
at which the grain fumigation costs at using phosphorus hydrogen preparations equal the damage values caused by
insects. The necessity of fumigation can be forecasted, according to the population growth time up to these limits.
For this purpose, simulation models at temperatures of 21, 24, 27, and 30°C have been used. The products of time and
temperature should be calculated at different temperatures and compared according to the simulation results and
forecast temperature values during grain storage in particular granary. The action thresholds have been determined
according to the models, at which fumigation should be carried out so that no economical losses or quality deteriora-
tion of grain be admitted. The results forecast have also been confirmed by freshly harvested wheat storage in a flat
storehouse and a metal silo bin. It has been established that grain fumigation can be avoided if grain is stored in flat
storehouses and cooled down by ventilation.

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