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- A chemical agent that absorbs moisture; desiccants can be used to control certain insect pests or mildew, and also to dry foliage before harvest (as with potatoes). Desiccants are regulated as pesticides under the Federal Insecticide, Fungicide, and Rodenticide Act.
- A chemical agent that absorbs moisture; some desiccants are capable of drying out plants or insects, causing death.
Source: Terms of the Environment