Cauliflower - Deformation
Symptoms
Boron deficiency symptoms start on the younger leaves. They remain small, are stiff and light green. Margins turn reddish or brown.
Older leaves are curled down and may show reddish discoloration or chlorosis.
Development of curds is retarded and only light curds are built. They are more or less brown. Several leaves and bracts penetrate curd surface. Taste is bitter.
Boron deficiency on cauliflower results in high yield losses.
Causes
Boron deficiency on cauliflower
High pH-values of soils promote boron deficiency on broccoli and cauliflower.
Cauliflower - Deformation
Symptoms
Boron deficiency symptoms start on the younger leaves. They remain small, are stiff and margins turn reddish or brown. Development of curds is retarded and only light curds are built.
Older leaves are curled down and may show chlorosis or reddish discoloration.
Boron deficiency on cauliflower results in high yield losses.
Causes
Boron deficiency on cauliflower (right) compared to optimum supply (left)
High pH-values of soils promote boron deficiency.
Cauliflower - Growth retardation
Symptoms
Boron deficiency symptoms start on the younger leaves. They remain small. Starting on margins they turn brown or reddish.
Development of curds is retarded and only light curds are built. In case of severe deficiency growing point dies off - as seen on the photo.
Older leaves may show chlorosis or reddish discoloration. Big veins of leaves and petioles are coarse and corky.
Boron deficiency on cauliflower results in high yield losses.
Causes
Severe boron deficiency in cauliflower.
High pH-values of soils promote boron deficiency.
Cauliflower - Hollowness
Symptoms
Boron deficiency on cauliflower leads to hollow stems. First within the stems watery tissue arises, which turns brown or sometimes black in process of time. Then affected tissue dehumidifies and hollow areas develop. Brown patches are visible within the stem.
Causes
Boron deficiency on cauliflower
High pH-values of soils promote boron deficiency on broccoli and cauliflower.
Cauliflower - Deformation
Symptoms
Young seedlings with Boron deficiency show stunted growth and severe leaf deformations. Leaf blades are reduced and cupped upwards.
Causes
Boron deficiency
Symptoms of Molybdenum deficiency look similar.
Cauliflower - Deformation
Symptoms
Young seedlings with Boron deficiency show stunted growth and severe leaf deformations. Leaf blades are reduced and cupped upwards.
Causes
Boron deficiency on young plants
Symptoms of Molybdenum deficiency look similar.
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
- Stabilization of plant tissues and improved plant and crop strength, working together with Ca
- Reducing effects of nutritional disorders such as tip burn and hollow heart
- Probably minimizing club root
- Increased crop quality and yield
Yara recommended fertilisers for Boron deficiency
YaraLiva NITRABOR
Cauliflower: Apply 400 to 600 kg/ha in the base dressing (club root) or broadcast
Read more about YaraLiva NITRABORYaraVita BORTRAC 150
![YaraVita BORTRAC 150](https://brandcenter.yara.com/fr/gallery/12632/images/lowres/66a72ee15dd8444584ba5805dea7b6e9.png)
Cauliflower: 3 l/ha at 4-6 leaf stage with repeat applications at the above rate at 10-14 day intervals for moderate to severe deficiency. Water rate: 200 l/ha.
Read more about YaraVita BORTRAC 150