Boron deficiency on citrus-Citrus

Change crop

Nutrients

Citrus - Deformation

Symptoms
Boron deficiency causes the death of the terminal growing point. The tree loses its apical dominance and sends out multiple shoots.

Reasons
Boron deficiency on shoots

Citrus - Deformation

Symptoms
Early breakdown of albedo, caused by poor boron supply. Gum spots in the albedo of the fruit and flesh near the rind may occur and result in fruit creasing (shrivelled surface makes processing more difficult).

Reasons
Boron deficiency Poor boron supply reduces calcium uptake and therefore can induce a breakdown of the albedo and promote post-harvest rot.

Citrus - Deformation

Symptoms
Boron deficiency causes the death of the terminal growing point. The tree loses its apical dominance and sends out multiple shoots.

Reasons
Boron deficiency on shoots

Citrus - Spots

Symptoms
A lack of boron results in gum pockets forming in the fruit albedo and flesh, near the rind. Fruit is small and hard with gum like spots appering on the skin.

Reasons
Boron deficiency Citrus is sensitive to boron. Poor boron supply reduces calcium uptake and therefore can induce a breakdown of the albedo and promote post-harvest rot.

Boron deficiency on citrus 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

More uniform and vigorous vegetative growth
Leaves are properly formed and premature drop is avoided
Fruit set and development is improved
Fruit quality (juice/sugar levels) enhanced
Fruit/rind ratio improved
Yield increased

Yara recommended fertilizers for Boron

YaraLiva NITRABOR

Citrus: 150-300 kg/ha applied monthly in early spring (ex. August + September). For more detailed advice on rates and timings, contact your local Yara Agronomist.

YaraTera CHELATE 1089

Citrus: Apply 3 - 5 kg/ha during the growing season through the irrigation water.

YaraTera CHELATE 1090

Citrus: Apply 3 - 5 kg/ha during the growing season through the irrigation water.

YaraVita BORTRAC 150

Citrus: 2 to 3 l/ha at white buds or when white buds are separated. Water rate: 500 l/ha minimum. Alternatively, 50 mls / 100 l at white buds or when white buds are separated, based on a typical TRV of 2500 l/ha and a maximum TRV of 4000 l/ha.

YaraVita CALTRAC BZ

Citrus: 5 l/ha from fruit set until 6 weeks before harvest at 10 to 14 day intervals. Water rate: 500 l/ha minimum. Alternatively, 150 mls / 100 l from fruit set until 6 weeks before harvest at 10 to 14 day intervals, based on a typical TRV of 2500 l/ha and a maximum TRV of 4000 l/ha.

YaraVita TRI-PHOLATE

Citrus: Apply 2 - 4 kg/ha during the growing season through the irrigation water. Alternatively, apply 0.5 kg/ha as a foliar spray. Repeat at 10 to 14 day intervals as necessary, with a maximum of six applications per season. Water rate: 200 l/ha.