Pest profile

Papaya Mealybug

Paracoccus marginatus · Hemiptera: Pseudococcidae[2]

Papaya mealybugs form cottony clusters and inject a toxin that yellows, stunts and deforms plants.[1]

Papaya mealybug, a yellowish insect coated in white wax with short waxy filaments, on a leaf
Papaya mealybug, a yellowish insect coated in white wax with short waxy filaments, on a leaf. Photo: bob080247, public domain (CC0), via iNaturalist

How to identify it

  • Infestations look like clusters of cotton-like masses on above-ground plant parts.[1]
  • Adult females are yellow under a white waxy coating, about 2.2 mm long.[1]

Look-alikes

Look-alikeHow to tell them apart
Other mealybugsMealybugs are most active in warm, dry weather.[1]

Where it lives

UF/IFAS profiles it as a pest in Florida.[1]

US map: public records from 3 states since 1990 (GBIF).

Biology and life cycle

It has been recorded on more than 55 host plants, including papaya, hibiscus, avocado, citrus, cotton, tomato, eggplant, peppers and beans.[1]

Damage and signs

  • Feeding injects a toxin that causes yellowing, stunting, leaf deformation and early leaf and fruit drop.[1]

Health risk

It feeds on plants; UF/IFAS mentions no risk to people.[1]

Control

Pesticides

General mealybug insecticides exist, but none are registered specifically for papaya mealybug; follow labels for your plant.[1]

Common questions

What are the cottony clusters on my hibiscus?
Possibly papaya mealybugs, which form cotton-like masses.[1]
Why are the leaves yellow and deformed?
Papaya mealybugs inject a toxic substance while feeding.[1]

Sources

  1. University of Florida IFAS Extension (Featured Creatures), “Papaya Mealybug, Paracoccus marginatus (EENY-302).” edis.ifas.ufl.edu/publication/IN579 (accessed 2026-10-06)
  2. iNaturalist, “Paracoccus marginatus taxon page (order and family).” www.inaturalist.org/taxa/922656 (accessed 2026-10-06)

Updated 2026-10-14. Built from sourced records. Spot an error? Tell us.