|Cottony Cushion Scale|
Icerya purchasi, the cottony cushion scale) is a scale insect that feeds on several ornamental species, but is most notoriously known as a pest of Citrus crops.
Description[edit | edit source]
White scales, found on woody growth.
Symptoms and Signs[edit | edit source]
The presence of large numbers can weaken and even kill the host plant.
Ecology[edit | edit source]
Originally from Australia, now present in many other regions.
Host plants[edit | edit source]
- Cedrus (Cedar)
- Morus (Mulberry)
Control[edit | edit source]
- Organic pesticides: Horticultural Oil, Neem Oil
- Predators and parasites: The ladybeetle Rodolia cardinalis has been successfully introduced as a biocontrol in most areas where the scale is present. Chryptochaetum iceryae, a parasitic fly, is also used.