<Emphasis Type="Italic">In vitro</Emphasis> biocontrol analysis of <Emphasis Type="Italic">Alternaria alternata</Emphasis> (Fr.) Keissler under different environmental conditions |
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Authors: | F Sempere M P Santamarina |
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Affiliation: | 1.Department of Agroforest Ecosystems, School of Rural Environments and Enology,Polytechnic University of Valencia,Valencia,Spain |
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Abstract: | The species Trichoderma harzianum was analyzed as possible biocontrol agent of Alternaria alternata under different environmental conditions (water activity and temperature). The strains were analyzed macroscopically to obtain
the Index of Dominance. The analysis was completed using two microscopic techniques. T. harzianum showed dominance on contact over A. alternata at all testing temperatures and water activities tested except at 0.95 a
w and 15 °C, at which T. harzianum inhibited A. alternata at a distance. Biocontrol was governed by different mechanisms such as competition for space and nutrients, mycoparasitism,
and possible antibiosis. Temperature and water activity significantly influenced fungal growth rate. |
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Keywords: | Alternaria alternata Index of Dominance rice Trichoderma harzianum water activity |
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