Boron deficiency made worse by
- Sandy soils
- Alkaline soils
- Soils low in organic matter
- High levels of nitrogen
- High levels of calcium
- Cold wet weather
- Periods of drought
Boron is important for
- Improves flowering
- Improves fruit set
- Gives more even ripening
- Increases alcohol level in berries
- Increases sugar level in berries
Yara recommended fertilizers for Boron
YaraVita® BORTRAC™
Vines: 1 pint/acre at flower truss visible, at flower buds separated and at fruit set. Also, 1-2 pints/acre after harvest before leaf senescence. Water rate: 50 to 100 gallons/acre.
Read more about YaraVita® BORTRAC™YaraVita® BUD BUILDER™WP
Grapevines: Apply 1 to 3 applications of 5-10 lbs/acre applied bud break thru pre-bloom at a 10-14 day interval. Also, during post-bloom thru berry sizing 1-2 applications in 7-14 day intervals. Also apply post-harvest before leaf senescence. Water rate: minimum 25 gallons/acre. Foliar application of Bud Builder may leave a white residue-deposit on the leaf or crop when applied close to harvest.
Read more about YaraVita® BUD BUILDER™WPYaraVita® PHOTREL™ADVANCE SC
Grapevines: 1-3 pints per acre. Two applications pre-flowering at a 10 to 14 day interval. Also, if necessary, one or two applications at no less than a 10 to 14 day interval from fruit set to start of ripening. Also, one application post-harvest. Water rate : 20 to 50 gallons per acre.
Read more about YaraVita® PHOTREL™ADVANCE SCYaraVita® POWERBOR™ Ca
Grapevines: 1 to 2 quarts/acre at flower truss visible, at flower buds separated and at fruit set. Also, 1 to 2 quarts/acre after harvest before leaf senescence. Water rate: 20 to 100 gallons per acre.
Read more about YaraVita® POWERBOR™ Ca