Rastrococcus invadens

Definition

A species of mealybug in the family Pseudococcidae, described by Williams in 1986. The specific epithet 'invadens' reflects its documented status as an invasive pest of agricultural and ornamental plants. Like other mealybugs, females are covered in powdery wax secretions and possess piercing-sucking mouthparts for feeding on phloem sap. The species has spread beyond its native range and is recognized as a significant pest of mango and other tropical fruit crops, causing direct damage through feeding and indirect harm via sooty mold growth on honeydew excretions.

Etymology

From Latin rastrum (rake, referring to the comb-like cerarii typical of the genus) + coccus (berry/scale insect); invadens (invading, invasive), referring to its pest status and geographic spread.

Example

Rastrococcus invadens was first described from specimens collected in tropical Asia and has since been recorded as an established pest in African mango orchards, where heavy infestations cause leaf chlorosis, shoot distortion, and fruit drop.

Related Terms

• Pseudococcidae
• mealybug
• Invasive species
• Mango mealybug
• Rastrococcus iceryoides
• phloem feeder
• Sooty mold
• Hemiptera
• Coccoidea

Usage Notes

The genus Rastrococcus contains several economically important mealybug species; R. invadens is distinguished from the congeneric mango mealybug R. iceryoides by details of cerarian structure and geographic distribution. In field identification, R. invadens typically presents as a larger, more robust mealybug with distinct longitudinal wax stripes. The species epithet is sometimes misspelled 'invaden' in older literature. Quarantine and biological control programs (notably using parasitoid wasps such as Gyranusoidea tebygi) target this species in regions where it has been introduced.