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Guttation
Tom
Zabadal , MSU Horticulture |
| Home > Scouting guide> guttation |
| This physiological
vine condition may occur on spring mornings when grapevine shoots
are young. If vineyard soils are saturated with water and high humidity
and calm weather minimize evaporation from leaf surfaces, a positive
pressure of sap in vines can cause water droplets to form on the
tips of serrations on the edge of the leaf. When that water evaporates,
it may leave salt deposits on the leaf margins. Guttation is not
harmful to the vine. |
 Photo: Annemiek
Schilder |
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| Salt accumulation from guttation on the margin
of a DeChaunac grape leaf in early June. Photo:
Tom Zabadal |
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Partial support from NC-IPM Center