de Villiers, E.A. 2001 Protopulvinaria pyriformis (Cockerell). Heart-shaped scale.. Pests and Beneficial Arthropods of Tropical and Non-citrus Subtropical Crops in South Africa. ARC-Institute for Tropical and Subtropical Crops Nelspruit, South Africa 525 pp.

Notes: Historical review, host plants, economic importance, description of stages, life cycle, seasonal history, feeding habits, natural enemies, chemical control and illustrations of this species.