The plastic articles consumed by the jumbo was believed to have been the left over of the two-month long pilgrimage of Sabarimala, which concluded last month.
The carcass of the jumbo was sighted at Valiyaanavattom under the wildlife area of Periyar west division on Saturday.
A top official said huge piles of plastic waste,including polythene carry bags, aluminium foil papers and wrappers of packed food were found in its abdomen during post-mortem.
"According to the veterinarians, the animal died of constipation and intestinal blockage. It could not digest the plastic in the intestine or take any other food," he said.
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He, however, said no similar incident was reported in the area in the recent past though the presence of plastic waste had been found in the dung of the wild animals before.
The carcass was cremated inside the Valiyaanavattom forest yesterday.