CANKERWORM

Small worms invisibly eating through crops or stored grain — Subtle destruction that goes unnoticed until significant damage has occurred; hidden corruption spreading gradually

Joel 1:4James 5:3

Flesh beginning to decay and rot from internal infection — Gangrene and rotting; spiritual or moral decay spreading from within like a disease

James 5:3

Metal tools or treasures corroding and losing their value — Corrosion of wealth, resources, and earthly possessions; the decay of material things

James 5:3