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Vibro-thermal disinfestor (VTD) is a simple electrically operated device for disinfestations of food grains. Insects in all their development stage are susceptible to killing by heat when exposed to temperatures of 55 to 60°C for 30 mins. The process is a rapid, non-chemical alternative to fumigation and kills all developmental stages of stored grain insects. The system is amenable for scale up and is mobile. The treatment does not affect germination of seeds as well. Its capacity is 40 kg/hr. The system is simple, can be fabricated without much capital investment, and is useful for farmers, merchants, and food grain exporters. One person and no technical knowledge can operate VTD is needed.