Mottled arum aphid
colonies of mottled arum aphids can greatly reduce plant vigour and kill the plant through sucking of plant sap. However, also at lower densities the aphids [...] damage plants because they produce large amounts of honeydew, which provides an excellent substrate for the growth of black sooty mould. Large areas of mould [...] green with black cross bands behind the head, broken along the midline, and a large horseshoe-shaped spot on the back of the abdomen. These black markings can