Boron Deficiency in Cauliflower
The common symptoms of boron deficiency in cauliflower and broccoli in the field are poor and discolored curd and bud formation respectively, which frequently render the crops unsuitable for marketing. The pith, especially in cauliflower, is liable to develop water-soaked areas, and to become necrotic and ultimately hollow. An early symptom in young seedlings is the rolling and down-curling of the newest leaves, which are abnormally small, brittle, and deformed. Sometimes leaves have a much enlarged midrib and little lamina. Under severe deficiency conditions, cauliflower plants showing such symptoms are unlikely to form a head. If broccoli is not in bud when the deficiency becomes established, the stem stops growing, giving a flat-topped plant with many side shoots.