Fungal diseases can be controlled through crop rotation, field hygiene (destruction of crop residues) or through spraying with fungicides. Temperature: Bulbs form at relatively high temperatures. Use 300 kg/ha CAN when plants start growing after transplanting to encourage early vegetative growth, which may be applied in two splits. As bulbs form, avoid earthing up, otherwise moist conditions may encourage rotting of the bulbs or development of thick necks. The cool environment will encourage toughening of the scaly leaves to be able to protect the inner flesh.

Source: Daily Nation March 10, 2017 17:38 UTC