Chilocorus kuwanae (Sylvestri) was imported from Korea to the United States for release against the euonymus scale (Unaspis euonymi (Comstock)). Field observations suggest that C. kuwanae feeds on a number of other armored scale insects, including white peach scale (Pseudaulacaspis pentagona (Targionni-Tozzeti)) and obscure scale (Melanaspis obscura (Comstock)). However, such observations have not been rigorously examined under controlled conditions. Our laboratory investigations indicate that C. kuwanae survives and reproduces well on San Jose scale (Quadraspidiotus perniciosus (Comstock)), in addition to euonymus scale. Fecundity was reduced in adults fed white peach scale. Few larvae survived to adulthood when fed oleander scale (Aspidiotus nerii (Bouche)). Adults failed to reproduce on obscure scale; none of the larvae fed this host survived to the pupal stage.

Chilococrus kuawanae, biological control, integrated pest management, armored scale insects
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Author notes

1Support for this project provided by the Horticultural Research Institute, International Society of Arboriculture Research Grant Program, and Competitive Grant Program of the Maryland Agricultural Experiment Station. Scientific article No. A6395 Contribution No. 8582 of the Maryland Agricultural Experiment Station.

2Graduate research assistant. Present address: Department of Entomology, University of Maryland, College Park, MD 20742.

3Professor and graduate research assistant, respectively.

4Assistant professor. Present address: Department of Entomology, Purdue University, West Lafayette, IN 47907.

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1993