Seasonal Abundance of Greedy Scale (Homoptera: Diaspididae) and Associated Parasitoids on Taraire (Beilschmiedia tarairi)
Authors: BLANK, R. H.; GILL, G.S.C.; OLSON, M. H.
Source: Journal of Economic Entomology, Volume 88, Number 6, December 1995 , pp. 1634-1640(7)
Publisher: Entomological Society of America
Abstract:Greedy scale, Hemiberlesia rapax (Comstock), is an important quarantine pest of kiwifruit, Actinidia deliciosa (A. Chevalier.) C. F. Liang & A. H. Ferguson. Scale infest kiwifruit by aerial invasion of crawlers from adjacent host plants such as taraire, Beilschmiedia tarairi Bentham & Hooker. A study on the ecology of greedy scale on taraire measured scale abundance and parasitism by a complex of 3 parasitoids, Encarsia citrina (Craw), Signiphora merceti (Malenotti), and Signiphora flavella (Girault) over 3 seasons. Greedy scale was found to have 2 generations each year. Scale populations remained low (14-38 scale per 100 leaves) over 3 successive generations when parasitism rates remained steady (16-27 parasitoids per 100 scale). Scale populations increased 7-fold in the 4th winter generation when rates of parasitism dropped to low levels (4 parasitoids per 100 scale). Scale populations remained at high levels (303-356 scale per 100 leaves) over the next 2 generations causing massive invasion of scale into the adjacent kiwifruit orchard. This was despite the resurgence in the rates of parasitism (13-29 parasitoids per 100 scale).
Document Type: Research Article
Publication date: December 1, 1995
- Journal of Economic Entomology is published bimonthly in February, April, June, August, October, and December. The journal publishes articles on the economic significance of insects and is divided into the following sections: apiculture & social insects; arthropods in relation to plant disease; forum; insecticide resistance and resistance management; ecotoxicology; biological and microbial control; ecology and behavior; sampling and biostatistics; household and structural insects; medical entomology; molecular entomology; veterinary entomology; forest entomology; horticultural entomology; field and forage crops, and small grains; stored-product; commodity treatment and quarantine entomology; and plant resistance. In addition to research papers, Journal of Economic Entomology publishes Letters to the Editor, interpretive articles in a Forum section, Short Communications, Rapid Communications, and Book Reviews.
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