Hollow stem of cole crops
Hollow stem, a condition of cabbage, cauliflower, and broccoli, may occur during very rapid growth. On
affected plants the interior pith tissue of the stem or head is collapsed or cracked and often hollow.
Usually the head or stem must be cut open to see the damage.
High temperatures, in combination with high levels of nitrogen
and large stem diameters, are associated with the disorder.
Wide spacing of plants may also contribute to the problem.
Plants deficient in boron may exhibit symptoms, but when
boron deficiency is involved, the interior of the cracked
stem cavity is darkened. Keeping nutrients at recommended levels and avoiding excessive rates of growth help prevent
infected with hollow stem