Comparative Ecoclimatic Assessments of Anaphes Diana (Hymenoptera: Mymaridae) and Its Intended Host, Sitona discoideus (Coleoptera: Curculionidae), in New Zealand

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A computerized system, CLIMEX (Sutherst & Maywald 1985), was used to evaluate ecoclimatic characteristics of Sitona discoideus (Gyllenhal), an introduced pest of dryland alfalfa in New Zealand, and its potential biological control agent, Anaphes Diana (Girault). Temperature and moisture response parameters were established for both species by comparing growth and ecoclimatic indices with known seasonal occurrence and relative abundances at locations where each species is usually found. The parameters then were used to generate indices for areas within New Zealand. For S. discoideus, we wanted to determine possible climatic distributional limits and for A. diana, to indicate possible climatic restrictions to its likely establishment and survival. Climate did not appear to account for the absence of damaging populations of S. discoideus in some regions of New Zealand. This supports a suggestion that the type of soil may limit S. discoideus damage potential. The output also strongly indicated that aestivation of discoideusS. in New Zealand is a relict phenomenon. Furthermore, our results suggested that the climate throughout most of New Zealand favors A. diana establishment and survival.

Document Type: Research Article

Publication date: August 1, 1989

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  • 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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