Major plant pest causing considerable plant damage to a wide variety of plants. Cabbage White Caterpillars are a major pest of all brassicas, including swede, turnip and parsnip. Feeding commonly seen on leaves, seedlings, shoots, flowers and even fruit. Large, irregular holes can be seen on leaves often with feeding damage occuring on the leaf edges. Black frass (droppings) also usually visible. The caterpillars are usually visible on the plant and feed during the day. Caterpillars are the grubs of butterflies and moths and have legs along the length of their body.