Citrus is one of the most important commercially grown agricultural products in the United States. Additionally, many citrus varieties are backyard crop plants, providing important sources of food at a local community level. As a result, citrus is one of the most economically important groups of plants. Numerous insect pests threaten the citrus industry and backyard citrus trees through feeding damage, while other pests vector diseases that are potentially lethal.

Citrus Pests Key is aimed primarily at extension agents, inspectors, and other plant professionals with access to a light microscope and hand lens. It is designed to help users determine which type of citrus insect pest they have encountered by featuring an interactive key coupled with illustrated, descriptive fact sheets for each pest. Citrus Pests Key is intended to be used as a screening aid. For definitive species identification, specimens should be sent to an expert for verification.