Bug Honeydew was a Sweet Treat for California Indians

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Certain insects in the true bug order are specialized to only feed on plant sap, including all aphids (Aphidae) and scales (Coccidae), and most of the planthoppers, leafhoppers, froghoppers, and cicadas (Hemiptera:Auchenorrhyncha aka Homoptera). These insects have syringe-like mouthparts to pierce the sap and/or water-conducting vessels of leaves, veins, stems, and fruits. Their adaptation to their extremely watery diet has also given rise to a very long intestinal tract with which they can absorb most of the nutrients of the sap before it passes out. But this still isn’t enough to absorb the sap’s sugars and other nutrients completely, so their frass (insect excrement) is very sweet.

A) shows an aphid piercing plant tissue with its syringe-like mouthpart B) shows how this stylet pierces a single cell (in this case making it ideal for sampling cell contents for an experiment by a plant physiologist) Credit: http://5e.plantphys.net/article.php?ch=t&id=136

This sugar-rich exudation of…

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