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: Apply 400 to 600 kg/ha in the base dressing (club root) or broadcast
Read more about YaraLiva NITRABORCauliflower: 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