From American Pomological Society.
Interesting corn cob idea!
The adult curculio hides in bark cervices or debris on the ground overnight. In the winter they stay in debris and leaf litter in orchards or nearby woodlands. They become active in the spring once temperatures get regularly over 70 degrees. So by the time peach trees are in full bloom the curculios are out and ready to lays eggs on newly developing fruit by the shuck split stage.