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Nosema scripta N. Sp. (Microsporida: Nosematidae), A Microsporidian Parasite of the Cottonwood Leaf Beetle, Chrysomela scripta (Coleoptera: Chrysomelidae)1

Corresponding Author

LEAH S. BAUER

North Central Forest Experiment Station, United States Department of Agriculture-Forest Service and Pesticide Research Center, Michigan State University, East Lansing, Michigan 48824

To whom correspondence should be addressed.Search for more papers by this author

H. STUART PANKRATZ,

H. STUART PANKRATZ

Department of Microbiology and Public Health, Michigan State University, East Lansing, Michigan 48824

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LEAH S. BAUER,

Corresponding Author

LEAH S. BAUER

North Central Forest Experiment Station, United States Department of Agriculture-Forest Service and Pesticide Research Center, Michigan State University, East Lansing, Michigan 48824

To whom correspondence should be addressed.Search for more papers by this author

H. STUART PANKRATZ,

H. STUART PANKRATZ

Department of Microbiology and Public Health, Michigan State University, East Lansing, Michigan 48824

Search for more papers by this author

First published: March 1993

https://doi.org/10.1111/j.1550-7408.1993.tb04893.x

Citations: 10

This article reports the results of research only. Mention of a proprietary product does not constitute an endorsement or a recommendation for its use by the USDA.

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Abstract

ABSTRACT. Nosema scripta (Microsporida: Nosematidae), a new species of microsporidian parasite, is described from the cottonwood leaf beetle, Chrysomela scripta F. (Coleoptera: Chrysomelidae), in North America. Studies using light and electron microscopy reveal that this species completes its life cycle in direct contact with the cytoplasm of cells within the fat body, midgut, hindgut, muscles, central nerve cord, Malpighian tubules, tracheal end cells, and ovaries. the microsporidium is monomorphic, all life stages are diplokaryotic, and spores develop from disporous sporonts. The mature spores are broadly oval and measure 4.2 ± 0.10 times 3.4 ± 0.04 μm. Spores contain a tubular polar filament that is arranged peripherally in a single layer of 13-15 coils. Both horizontal transmission and vertical transmission have been demonstrated for this microsporidium in C. scripta in the laboratory. The Colorado potato beetle, Leptinotarsa decemlineata (Say), was susceptible to infection with this pathogen in cross-infectivity studies.

LITERATURE CITED

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Volume40, Issue2

March 1993

Pages 135-141

Nosema scripta N. Sp. (Microsporida: Nosematidae), A Microsporidian Parasite of the Cottonwood Leaf Beetle, Chrysomela scripta (Coleoptera: Chrysomelidae)1

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Nosema scripta N. Sp. (Microsporida: Nosematidae), A Microsporidian Parasite of the Cottonwood Leaf Beetle, Chrysomela scripta (Coleoptera: Chrysomelidae)1

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LITERATURE CITED

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