Common on Brassicaceae. (Animal and Plant Health Agency (2020). Factsheets for 21 established invasive species of common concern to Anguilla and TCI for either eradication or control. FERA);
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Larvae feed on leaves, flowers and the buds of their host plant. All stages of the larvae feed on the host plant. Initially the early instars feed on everything but the veins of the leaves but latter instars are voracious feeders. (Animal and Plant Health Agency (2020). Factsheets for 21 established invasive species of common concern to Anguilla and TCI for either eradication or control. FERA);
Can completely decimate crops. As an example, a summer crop in Jiangsu was found to have a 99% loss in 1990 and 80% loss in 1994 in the absence of sprays. Even mild infestations can lead to the malformation of cabbage, broccoli and cauliflower heads while even the presence of larvae can put off buyers. (Animal and Plant Health Agency (2020). Factsheets for 21 established invasive species of common concern to Anguilla and TCI for either eradication or control. FERA);
Terrestrial. Thought to have originated in Africa. (Animal and Plant Health Agency (2020). Factsheets for 21 established invasive species of common concern to Anguilla and TCI for either eradication or control. FERA);
Natural dispersal: via air convection currents. Adults may be passively spread this way over colossal distances, but larvae may also adhere to organic material with silk that then might get caught up in convection currents. Mass migrations may also occur assisted by winds. Movement may occur between field margins, but they are weak fliers. Intentional/Anthropogenic dispersal: immatures may be inadvertently dispersed on plant material. Other life stages might be transported on residues being disposed of, or vegetables destined for the market. Otherwise: land vehicles, mail, clothing, soil etc. (Animal and Plant Health Agency (2020). Factsheets for 21 established invasive species of common concern to Anguilla and TCI for either eradication or control. FERA);
Animal and Plant Health Agency (2020). Factsheets for 21 established invasive species of common concern to Anguilla and TCI for either eradication or control. FERA;