the control,s effect combination of microwave radiation and cold storage on adults oryzaephilus surinamensis and tribolium castaneum

abstract during these protracted years, mankind’s main foods consist of grains-specially wheat, oats and rice. granary production and its storage have been one of the main concerns of a human being for a long time. microwave radiation as a safe insect control agent could secure high mortality rate of insect population by increasing the temperature of insects’ body and its niche. low temperature affects insects via lowing their growth, feeding and fecundity or lowering their length of life. tribolium castaneum and oryzaephilus surinamensis which are two main stored-product insects were exposed to 2450 mhz frequency at level power 100 w for 10 min continuously and intermittently. ). after the treatment, the samples were transferred to a fridge with 6±1° c for 48 and 72 h. the results showed that saw-toothed grain beetle was more susceptible to microwave radiation and cold storage than red flour beetle. the results revealed that the penetration pattern of microwave radiation is non-linear and a quadratic equation with significant r-square value fits the data highly well. to evaluate the red flour beetle, behavior under microwave radiation, we set up an appropriate device to measure escape-distance preference. results showed that the insects preferred short cut for escaping from microwave exposure.