Authors: STEINKRAUS, DONALD C.; KRAMER, JOHN P.

Source: Environmental Entomology, Volume 18, Number 6, December 1989 , pp. 1147-1152(6)

Publisher: Entomological Society of America

Abstract:

Erynia aquatica (Anderson and Ringo) (Zygomycetes: Entomophthoraceae) was discovered infecting wild Aedes fitchii (Felt and Young) (Diptera: Culicidae) pupae in snowpools in Upstate New York. Conidia from infected A. fitchii pupae were used to inoculate laboratory-reared, healthy A. aegypti (L.) pupae. A total of 10.7% of the adult A. aegypti that emerged from these pupae died from the mycosis and were filled with the resting spore stage of E. aquatica. Mature resting spores were round, thick walled, and 31.3 ± 3.7 μm in diameter. Resting spores contained an average of 13 ± 2.8 nuclei per resting spore. Numerous rhizoids grew out of the cadavers of infected adult A. aegypti. Rhizoids varied in width from 8.4 to 21 μm and were up to 2,000 μm long. Adult A. aegypti died from the mycosis between 8 and 17 d after inoculation. The only reproductive stage E. aquatica produced in infected adult A. aegypti was the resting spore stage. The life cycle of E. aquatica is unusual for the Entomophthoraceae, because the pathogen produces conidia in immature hosts and resting spores in adult hosts. A. fitchii and A. aegypti are new host records for E. aquatica.

Document Type: Research article

Publication date: 1989-12-01

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• Environmental Entomology is published bimonthly in February, April, June, August, October, and December. The journal publishes reports on the interaction of insects with the biological, chemical, and physical aspects of their environment and is divided into the following sections: physiological ecology; chemical ecology; population ecology; quantitative ecology; community and ecosystem ecology; biological control­-parasitoids and predators; biological control--microbials; biological control--weeds; behavior; pest management; sampling; plant-insect interactions; molecular ecology and evolution; transgenic plants and insects. In addition to research papers, Environmental Entomology publishes Letters to the Editor, interpretive articles in a Forum section, and Book Reviews.
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