Feeding commonly on leaves, seedlings, shoots, flowers and fruit. Large, irregular holes can be seen on leaves often with feeding damage occuring on the leaf edges. Black frass (droppings) also visible.
Product Solution: Spray with Sprayday Greenfly Killer or Provado Ultimate Fruit and Vegetable Bug Killer Ready To Use/ Concentrate when caterpillars are present and repeat 10-14 days later. Alternatively if the caterpillars are not far advanced in thier life cycle spray with Provado Ultimate Bug Killer Ready to Use.
Cultural measures: Remove and destroy clusters of eggs when seen. Pick off caterpillars by hand where ever possible (particular problem on all brassica species).