Modelling the escape of Chondrostereum purpureum spores from a larch forest with biological control of Prunus serotina |
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| Authors: | Meindert D De Jong Patricia S Wagenmakers J Goudriaan |
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| Institution: | (1) Centre for Agrobiological Research (CABO), P.O. Box 14, 6700 AA Wageningen, the Netherlands;(2) Present address: Tarthrost 195, 6708 HJ Wageningen, the Netherlands;(3) Research Station for Fruit Growing, Brugstraat 51, 4475 AN Wilhelminadorp, the Netherlands;(4) Theoretical Production Ecology, Agricultural University, P.O. Box 14, 6700 AA Wageningen, the Netherlands |
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| Abstract: | Chondrostereum purpureum is being developed as a microbial herbicide to controlPrunus serotina in coniferous forests. After biological control, the fungus produces basidiospores that may reach and infect non-target plants. As part of a risk analysis, spore escape from a forest was quantified. For this purpose, a stratified model was developed for a forest of 250 m with 250 m. A turbulent diffusion equation was used to describe spore fluxes for each layer.In a simple calculation procedure, the spore fluxes for the different layers were calculated simultaneously. The downwind escape fraction was found to vary from 0.19 to 0.45, and the upward escapte fraction from 0.07 to 0.23. These escape fractions increased with increasing wind speed.Number of spores released from basidiocarps, and escape fractions could be used as inputs for a Gaussian plume model to calculate spore immission into orchards. |
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| Keywords: | simulation spore dispersal turbulent diffusion model |
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