Lettuce aphid threat
The lettuce aphid (also known as currant-lettuce aphid) is a major pest of salad crops, particularly letttuces. Originating from Northern Europe, it was confirmed in Tasmania in mid-March 2004. Lettuce aphid is primarily a contamination pest. In general, the direct damage from the aphid is limited on lettuces, though large numbers of aphids may stunt young plants and cause leaves to become pale in colour and slightly deformed. Lettuce aphid can also transfer cucumber and lettuce mosaic virus. This 4-page factsheet covers the known hosts, life cycle, type of damage (primarily contamination of lettuce heads), management options and use of a chemical under an emergency use permit that was valid to 30 June 2005. It is up to users to ensure chemicals are currently registered or permitted for the intended use. An IPM approach is recommended, including use of resistant varieties, source control, monitoring, introduction and maintenance of beneficial insect populations, ‘soft’ foliar insecticides, sanitation and implementation of Insecticide Resistance Management (IRM) strategies.