Haricots - Chlorosis
Symptoms
Older leaves develop yellow edges and younger leaves wither.
Growing points die and multiple basal shoots develop as a consequence.
Reasons
Boron deficiency
B deficiency is rare in beans.
Haricots - Deformation
Symptoms
All leaves show a faint interveinal chlorosis. The margin of a young leaf tip is partiallly deformed, i.e. slightly shrivelled with small necroses.
Reasons
Boron deficiency
B deficiency is rare in beans.
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 pod set
- Improves pod fill
- Boosts yield
- Improves quality
