Chironomid midges are ubiquitous and ecologically important aquatic insects. However, some species can become pests when they occur in extremely high numbers, particularly those that colonize man-made habitats. Chironomus calligraphus is a Neotropical, pan-American species that has recently been found in the Nearctic region. This paper represents the 1st reported occurrence of C. calligraphus in Georgia. Extensive larval populations were found in the leaf sheaths and root masses of cattails and in the firm sandy substrates of a wastewater lake at an industrial site in coastal Georgia. Chironomus calligraphus was causing a significant economic impact at this site.
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