Each developmental growth stage in any of three species of storage pests: 1-Indian meal moth, Plodia interpunctella (Hub.) 2-Mediterranean flour mouth, Ephestia kuehniella (Zell.) 3-Saw toothed grain beetle, Oryzaephilus surinamensis (L.) were exposed to (2450MHZ) at power level of 100W, with exposure times of 300,600, and 9005ec as well as microwave radiation with power level of 200W with exposure times of 30,60, and l2OSec.The results revealed a direct relationship between mprtality rate and constant power as well as exposure time. Necessary power and exposure time to prevent egg hatch, along with adult, pupae and larval mortality were 100W and 900Sec, and 200W and l2OSec,respectively. Moreover males and females of Indian meal moth and Mediterranean flour moth exhibited a more mortality rate at power levels of 100 and 200W along with exposure times of 900 and l2OSec,respectively. Males were more sensitive than females to microwave radiation. The pupa of Mediterranean flour moth constituted the most sensitive developmental stage with 97.5% and 95% mortality rates in power levels of 100 and 200W along with exposure times of 900 and l2OSec respectively. The adult stage of Indian meal moth formed the most vulnerable phase with 87.5% and 92.5% mortality rates in power levels of 100 and 200W with exposure times of 900 and l2OSec respectively. The adult stage in Saw toothed grain beetle was the most vulnerable developmental stage with 87.5% and 92.5% mortality rates in power levels of 100 and 200W along with exposure times of 900Sec and l2OSec respectively. Moreover power levels of 200 along with 6OSec exposure time for adults in Mediterranean flour moth, and 100W with 600Sec exposure time are suitable for prevention of egg hatch in Indian meal moth and for acceptable mortality rate at adult and egg stages in Saw toothed grain beetle.
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