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Publication Date

1981

Keywords

Parasitoids; Insects--Geographical distribution; European corn borer

Abstract

During the 1940's and 1950's seven exotic parasitoids of the European corn borer (ECB) Ostrinia nubilalis (Hubner), were released in Minnesota. This study was done to determine which introduced parasitoids became established and their distribution in Minnesota. The experiment was conducted during the summer of 1977 and fall of 1977, 78, 79- and 80 in conjunction with the annual ECB population surveys in southern Minnesota by the State Department of Agriculture, Division of Plant Industry. Three introduced parasitoids, Macrocentrus grandii Goidanich, Eriborus Terebrans (Gravenhorst), and Sympiesis viridula (Thomson) and two native parasitoids, lshnus inquisitorius artricollaris (Walsh) and Aplomya caesar (Aldrich) were recovered. M. grandii was confined to the eastern portion, while E. terebrans was recovered from throughout southern Minnesota. S. viridula was found in only three counties, perhaps because of its biology it may have eluded recovery, resulting in underestimated distribution. The two native species, I. inquisitorius atricollaris and A. caesar, occur only occasionally in Minnesota.

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Entomology Commons

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