Relative inhibition of insect phenoloxidase by cyclic fungal metabolites from insect and plant pathogens

Authors

  • Patrick F. Dowd

    Corresponding author
    1. USDA, Agricultural Research Service, National Center for Agricultural Utilization Research, Bioactive Agents Research Unit, 1815 N. University St, Peoria, IL 61604, USA
    • USDA, Agricultural Research Service, National Center for Agricultural Utilization Research, Bioactive Agents Research Unit, 1815 N. University St, Peoria, IL 61604, USA
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  • This article is a US Government Work and is in the public domain in the USA.

Abstract

The fungal metabolite kojic acid, which is produced by Aspergillus and Penicillium species fungi that may be pathogens of both insects and plants, was a significant inhibitor of phenoloxidase of different representative beetle and caterpillar insect species. Fusaric acid and picolinic acid, produced by Fusarium spp., were also significant inhibitors of phenoloxidase, while dipicolinic acid and beauvericin were ineffective at concentrations tested. Previous reports of the ability of kojic and fusaric acid to inhibit defensive enzymes of plants suggest that these compounds may be important in allowing the producing fungi to be pathogens of both insects and plants. Published in 1999 by John Wiley & Sons, Ltd.

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