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In vitro compatibility of microbial agents for simultaneous application to control strawberry powdery mildew (Podosphaera aphanis)


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Sylla, Justine; Alsanius, Beatrix W.; Krüger, Erika; Becker, Dorit and Wohanka, Walter (2013) In vitro compatibility of microbial agents for simultaneous application to control strawberry powdery mildew (Podosphaera aphanis). Crop Protection, 51 (9), pp. 40-47.

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Online at: http://www.sciencedirect.com/science/article/pii/S0261219413001026


Biological control of plant pathogens on strawberries may be improved by the simultaneous application of different biological control agents (BCAs). Therefore, the compatibility of various BCAs which had previously shown to be effective against powdery mildew (Podosphaera aphanis (Wallr.) U. Braun & S. Takam) under laboratory conditions was examined in vitro. Inhibitory effects between fungal and bacterial BCAs were demonstrated in dual culture tests on two solid nutrient media. Leaf disc assays with single and multiple strain treatments demonstrated either unaffected or significantly improved control of P. aphanis for many multiple strain treatments, even if antagonistic interactions previously occurred in dual culture tests. Highest inhibition of powdery mildew conidiation (80.7% reduction) was achieved with multiple strain treatments with Bacillus subtilis FZB24 and Metarhizium anisopliae (p<0.001). In this combination, conidiation was 3.7 times lower than in single treatments with B. subtilis indicating synergistic interactions between these BCAs. Combinations of Trichoderma harzianum T58 and B. subtilis FZB24 showed antagonistic interactions in dual culture tests as well as in leaf disc assays. In this combination, powdery mildew conidiation on leaf discs was four times higher compared to single treatments with T. harzianum T58.

EPrint Type:Journal paper
Keywords:BÖL, BOEL, BÖLN, BOEL, FKZ 06OE354, FKZ 06OE155, ökologischer Erdebeeranbau, Graufäule, Echter Mehltau, Pflanzenschutz, Krankheitsregulierung, Biological control, BCA combinations, BCA compatibility
Subjects: Crop husbandry > Production systems > Fruit and berries
Crop husbandry > Crop health, quality, protection
Research affiliation: Germany > Federal Organic Farming Scheme - BOELN > Plants > Pflanzenschutz
Germany > Other organizations
Related Links:http://www.bundesprogramm-oekolandbau.de/, http://www.bundesprogramm.de/fkz=06OE354, https://orgprints.org/cgi/search/advanced?addtitle%2Ftitle=&keywords=06OE1354&projects=BOEL&_order=bypublication&_action_search=Suchen
Deposited By: Sylla, Justine
ID Code:22910
Deposited On:06 Aug 2013 09:09
Last Modified:06 Aug 2013 09:13
Document Language:English
Refereed:Peer-reviewed and accepted

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