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Weevil
Pest Context
Understand weevils are often pests harming crops or food supplies, relevant in agricultural and storage contexts. 
Specific Types
Weevils come in many types; some are named after the plants they affect, like rice weevil or boll weevil. 
Phrase Usage
The phrase 'weevil infestation' is common and signifies a large number of weevils causing problems. 