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Potential for Biological Control of Botrytis cinerea in Pinus sylvestris Seedlings

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Grey mould (Botrytis cinerea Pers.: Fr.) is the most common economically important fungal disease in Swedish forest nurseries. In tests in a growth room, foliage of predisposed (preinoculation incubation at 35°C for 4 days) Scots pine (Pinus sylvestris L.) seedlings was sprayed with suspensions containing Mycostop®, Binab® TF.WP or GlioMix® at concentrations of 0.5, 1 or 0.5 g lâ^’1, respectively, and/or conidia of B. cinerea (106 spores mlâ^’1). Binab and GlioMix reduced grey mould in needles by 94 and 92%, respectively, and were as effective as the fungicide Euparen® M 50 WG, while Mycostop reduced disease by 51%. In one trial in a forest nursery, Mycostop, Binab and GlioMix, each applied two and four times during the growing season, suppressed spontaneous B. cinerea infections in needles of first year container-grown P. sylvestris seedlings by 16â–“57%, and were as effective as recommended fungicidal sprays. It was concluded that biological control has potential to effectively suppress grey mould in seedlings in forest nurseries.

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Keywords: Biocontrol; Gliocladium; Streptomyces griseoviridis strain K61; Trichoderma harzianum; Trichoderma polysporum; conifer seedlings

Document Type: Research Article

Affiliations: Department of Forest Mycology and Pathology, Swedish University of Agricultural Sciences, SE-750 07, P.O. Box 7026, Uppsala

Publication date: 2004-04-01

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