A network that helps people worldwide obtain rapid advice and information on crop protection, including the identification and management of plant pests.
PestNet is a network that helps people worldwide obtain rapid advice and information on crop protection, including the identification and management of plant pests. It started in 1999. Anyone with an interest in plant protection is welcome to join. PestNet is free and is moderated, ensuring that messages are confined to plant protection.
December 2002. Palau sent photos of a scale insect on Minature Holly, Malphighia coccigera, and asked for an identification.
It was identified as a wax scale (order Hemiptera, suborder Sternorrhyncha, family Coccidae, soft scales, genus Ceroplastes). It is similar to C rusci, which is abundant in a couple of places in Darwin in northern Australia, but this species is recorded primarily as a temporate species. A number of other species also look like those in your photos including C floridensis and C sinensis, and are shown in photographs Ting Kui Qin and Penny Gullan. 1994. Taxonomy of the Wax Scales in Australia, Invertebrate Taxonomy 8: 923-59. Further information can be found on the ScaleNet website at www.sel.barc.usda.gov/scalenet/scalenet.htm
It is not possible ot identity the scales to species without examination of microscope slide-mounted specimens. Heavy infestations cause sooty mould and can cause defoliation.
It was not thought to be not C rusci and C rubens was suggested; however, not all agreed that it was C rubens and cited Qin and Gullan. 1994. Taxonomy of the Wax Scales (Hemiptera: Coccidae: Ceroplastinae) in Australia. Invertebrate Taxonomy 8: 923-959).