Gesunde Pflanzen (2007) 59, 107-117

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Gabriele Berg, Rita Grosch and Katja Scherwinski (2007)
Risikofolgeabschätzung für den Einsatz mikrobieller Antagonisten: Gibt es Effekte auf Nichtzielorganismen?
[Risk assessment for microbial antagonists: Are there effects on non-target organisms?]
Gesunde Pflanzen 59 (3), 107-117
Abstract: Biological control of phytopathogenic fungi using antagonistic microorganisms is an environmentally friendly alternative in plant protection. However, possible non-target effects of the applied antagonists on ecologically important soil-microbes need to be considered. Therefore, the aim of this study was to analyse the effect of biological control agents (BCAs) on non-target microbes in the field. Whereas the bacterial BCAs Serratia plymuthica HRO-C48 and Streptomyces sp. HRO-71 were applied to control the pathogen Verticillium dahliae on strawberry and potato, the bacterial strains Pseudomonas trivialis 3Re2-7, P. fluorescens L13-6-12, S. plymuthica 3Re4-18 and the fungal antagonists Trichoderma reesei G1/8 and T. viride G3/2 were introduced to control Rhizoctonia solani on lettuce and potato. As the analysed BCAs belong to different microbial groups like grampositive (HRO-71) and gramnegative (HRO-C48, L13-6-12, 3Re2-7, 3Re4-18) bacteria or the ascomycota (G1/8, G3/2) and originated from different micro-habitats like the rhizosphere or the endorhiza, general conclusion could be drawn from our results. After BCA treatment we did not observe any long-term effect on the plant-associated microbes in any tested pathosystem. Therefore, no sustainable risks could be seen for the indigenous micro-organisms. Our new findings may help to improve the development as well as the registration procedures of future microbial plant protection products.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
(original language: German)
Link to article at publishers website
Database assignments for author(s): Gabriele Berg, Rita Grosch

Research topic(s) for pests/diseases/weeds:
biocontrol - natural enemies
Research topic(s) for beneficials or antagonists:
non-target effects/fate in environm.

Pest and/or beneficial records:

Beneficial Pest/Disease/Weed Crop/Product Country Quarant.

Rhizoctonia solani Potato (Solanum tuberosum)
Rhizoctonia solani Lettuce (Lactuca)
Verticillium dahliae Potato (Solanum tuberosum)
Verticillium dahliae Strawberry (Fragaria)
Trichoderma viride (antagonist) Rhizoctonia solani Potato (Solanum tuberosum)
Trichoderma viride (antagonist) Rhizoctonia solani Lettuce (Lactuca)
Pseudomonas fluorescens (antagonist) Rhizoctonia solani Potato (Solanum tuberosum)
Pseudomonas fluorescens (antagonist) Rhizoctonia solani Lettuce (Lactuca)
Serratia plymuthica (antagonist) Rhizoctonia solani Potato (Solanum tuberosum)
Serratia plymuthica (antagonist) Rhizoctonia solani Lettuce (Lactuca)
Serratia plymuthica (antagonist) Verticillium dahliae Potato (Solanum tuberosum)
Serratia plymuthica (antagonist) Verticillium dahliae Strawberry (Fragaria)
Trichoderma reesei (antagonist) Rhizoctonia solani Potato (Solanum tuberosum)
Trichoderma reesei (antagonist) Rhizoctonia solani Lettuce (Lactuca)