Icerya purchasi (commonly known as the cottony cushion scale) is a species of scale insect native to Australia but now widespread across various regions, including the Comunidad Valenciana. This pest is well-known for its destructive impact on diverse host plants, particularly citrus trees, where it can cause significant agricultural damage.

The cottony cushion scale exhibits the following characteristics:

• Appearance: The insect is easily identifiable by its distinctive cotton-like, waxy egg sac that it produces. Adult females are about 5 mm in length, with an oval, reddish-brown body.
• Biology: Icerya purchasi reproduces through a process called parthenogenesis, where females can produce offspring without mating. This contributes to their rapid population growth and potential to infest plants.
• Damage: The insect feeds on the sap of host plants, leading to yellowing leaves, reduced growth, and in severe cases, plant death. The presence of honeydew, a sugary substance excreted by the pest, can promote sooty mold growth, further harming the plant.

Control of this pest often involves the introduction of its natural enemy, the Rodolia cardinalis (Vedalia beetle), which is an effective biological control agent used in the Comunidad Valenciana.