Papaya mealybug, Paracoccus marginatus (Pseudococcidae: Hemiptera): A serious constraint in papaya cultivation

Papaya mealybug, Paracoccus marginatus Williams and Granara de Willink (Hemiptera: Pseudococcidae), has emerged as a serious constraint to papaya cultivation in many tropical and subtropical regions. The pest is highly invasive and polyphagous, infesting papaya and several other important crops. Both nymphs and adult females cause damage by sucking sap from leaves, stems, and fruits, resulting in leaf curling, chlorosis, stunted growth, fruit deformation, and premature leaf drop. The rapid spread, high reproductive potential, and protective waxy covering of the papaya mealybug make its management difficult under field conditions. Yield losses can be severe, particularly under favourable climatic conditions, posing a threat to farmers’ livelihoods and sustainable papaya production. This article provides an overview of the distribution, host range, biology, damage symptoms, and economic importance of P. marginatus, along with an emphasis on integrated management strategies.