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How Ardula Colaspidis (Allantonematidae) N. Sp., a New Parasite of the Grape Colaspis (Coleoptera: Chrysomelidae)

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Howardula colaspidis, a nematode parasite of the grape colaspis (Colaspis brunnea) is described. This species closely resembles H. dominicki but can be distinguished from the latter by having fewer ovarian cells, a longer uterus, and a shorter vulva to tail tip distance in the infective female. Also, the parasitic female of H. colaspidis is longer and relatively narrower than that of H. dominicki. Juveniles exited from female beetles during oviposition and occasionally from beetle larvae, but not from parasitized male beetles. Parasitism did not appear to reduce the fecundity of the adult. Over a 2-year period, parasitism of the host insect declined from 24 to 3% in corn and soybean fields in northeastern North Carolina.

Affiliations: 1: Tobacco Research Laboratory, Federal Research, Science and Education Administration, USDA, Oxford, NC 27565, U.S.A.

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/content/journals/10.1163/187529279x00370
1979-01-01
2016-12-07

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