 Cavity spot, caused by the oomycetes "Pythium violae" and "Pythium sulcatum", results in irregularly shaped, depressed lesions on the taproots.Physical damage can also reduce the value of carrot crops.The two main forms of damage are splitting, whereby a longitudinal crack develops during growth that can be a few centimetres to the entire length of the root, and breaking, which occurs postharvest.