Leafhoppers feed on the contents of tracheids and vessels.The concentration of organic material in these plant components is

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Leafhoppers feed on the sap from the phloem of plants, which contains a relatively low concentration of organic material compared to other parts of the plant, such as the leaves or fruits. Tracheids and vessels, part of the xylem, primarily transport water and minerals, not organic materials.

Leafhoppers Feed on the Contents of Tracheids and Vessels