Starting on the tips grapes turn brown and dry out.
Low calcium concentrations produce brown discoloration and rotting starting on the tips of grapes. Subsequently grapes dry out.
Calcium deficiency (upper row)
Grapevines: Two applications of 5 L/ha at a 10 to 14 day interval prior to flowering. Also, repeated applications of 5 L/ha at 10 to 14 day intervals from fruit set e.g. fruit set, bunch closure ( pea sized berries ), start of ripening and two weeks later. Water rate: 200 L/ha. NB Late applications may leave a deposit on berries which may be of significance for table grapes.Read more about YaraVita CALTRAC
Grapevines: Fertigate 130-360 l/ha in multiple applications from growth stage; new shoot growth to fruit set and again during post harvest. Refer to Yara crop programs and contact your local Yara sales agronomist for advice.Read more about N-CAL 15+18Ca+B