Dear Jessica: Can you please tell me what these droplike things are on the leaves in the picture? If it’s a disease, how do I treat it? — Marilyn Von Braunsberg, Oceanside Dear Marilyn: Those sticky ...
Hydathodes are specialised leaf structures that facilitate guttation, the exudation of xylem sap as droplets at leaf margins or surfaces under conditions of high root pressure and low transpiration.
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