Guttation
The release of liquid droplets from leaf edges or tips through hydathodes, usually when root pressure continues while transpiration is low.
Guttation occurs when roots take up water faster than the plant loses it through transpiration Transpiration Water moving up through the plant and evaporating out through the stomata. It drives nutrient uptake, and carries calcium, which moves almost entirely by that flow. . Positive pressure in the xylem pushes liquid through specialized openings called hydathodes.
The droplets contain xylem sap rather than condensed water. They can contribute to leaf wetness, but disease risk depends on the pathogen, host tissue, duration of wetness and surrounding conditions.