Boron deficiency affects younger tissue, particularly active growing points of shoot, root, flower and fruit. Plants display a bronzed appearance. Often associated with low calcium status, plants suffer from slow growth and poor or irregular expansion of tissue at the growing points.
Boron stress reduces flowering response and pollination, leading to reduced seed, tuber or fruit set. Maturation is delayed and starch accumulation is reduced, leading to slower development and greater risk of internal problems in seed and fruit. Boron deficiency is often associated with reduced tolerance to drought and heat stress, low Brix and increased disease pressure.
Check soil status and root development for compaction. Routine foliar treatment can be very effective, especially during the early stages of plant development and times of stress.