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Effects of cuticle source and concentration on germination of conidia of two isolates of Nomuraea rileyi

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Abstract

The effects of cuticle from larvae of Trichoplusia ni, Heliothis zea and H. virescens on rate and extent of germination of conidia of a Mississippian isolate (MS) and an Ecuadoran (EC) isolate of Nomuraea rileyi were studied. Solid substrates generally stimulated more germination than submerged substrates. There was little or no effect of cuticle source (H. zea or H. virescens) on germination of either the EC isolate or the MS isolate cultured on a solid substrate, however, differences in patterns of germination were obtained in submerged substrates. Addition of cuticle of H. zea or H. virescens generally increased the germination time for the MS isolate. Germination time for the EC isolate was significantly increased when H. virescens cuticle was used.

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Authors and Affiliations

  1. Biological Control of Insects Research Laboratory, U.S. Department of Agriculture, Agricultural Research Service, Research Park, P.O. Box 7629, 65205, Columbia, MO, USA

    Galal N. El-Sayed & Carlo M. Ignoffo

  2. Northern Regional Research Center, U.S. Department of Agriculture, Agricultural Research Service, 1815 N. University Street, 61604, Peoria, IL, USA

    Timothy D. Leathers

Authors
  1. Galal N. El-Sayed
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  2. Carlo M. Ignoffo
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  3. Timothy D. Leathers
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This article reports the results of research only. Mention of a proprietary product in this paper does not constitute a recommendation for use by U.S. Department of Agriculture.

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El-Sayed, G.N., Ignoffo, C.M. & Leathers, T.D. Effects of cuticle source and concentration on germination of conidia of two isolates of Nomuraea rileyi . Mycopathologia 113, 95–102 (1991). https://doi.org/10.1007/BF00442417

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  • DOI: https://doi.org/10.1007/BF00442417

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