Bioherbicidal activity from washed spores of Myrothecium verrucaria

  • Mark A. Weaver
  • C. Douglas Boyette
  • Robert E. Hoagland
Original Paper
First Online:
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Accepted:

Abstract

The fungal plant pathogen, Myrothecium verrucaria, is highly virulent to several important weed species and has potential utility as a bioherbicide. However the production of macrocyclic trichothecene mycotoxins by this fungus presents significant safety concerns. It was discovered that trichothecenes are removed from M. verrucaria spores by repeated washes with water. These washed spores retained bioherbicidal efficacy against kudzu when tested in field trials and on sicklepod when tested under greenhouse conditions. Changes in the growth medium combined with washing spores with water resulted in greater than 95% reduction in roridin A and verrucarin A. Washing spores reduced trichothecene concentrations in spore preparations with no significant effect on plant biomass reduction, thus demonstrating the possibility of M. verrucaria formulations with improved safety to researchers, producers and applicators.

Keywords

Bioherbicide Sicklepod Cassia obtusifolia kudzu Pueraria lobata Roridin Verrucarin 
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Copyright information

© Springer Science+Business Media B.V. (outside the USA) 2012

Authors and Affiliations

  • Mark A. Weaver
    • 1
  • C. Douglas Boyette
    • 1
  • Robert E. Hoagland
    • 1
  1. 1.United States Department of AgricultureAgricultural Research ServiceStonevilleUSA

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