Trichoderma atroviride IMI206040 was maintained on potato dextrose agar (PDA, BD, Franklin Lakes, NJ, USA) and incubated at 28 °C with a 12 h/12 h light cycle.
Fusarium culmorum, F. equiseti, F. oxysporum, F. sporotrichoides, Sclerotinia sclerotiorum, Botrytis cinerea, Rhizoctonia solani, Penicillium citrinum, P. crustosum, and Aspergillus versicolor were maintained on PDA or malt extract (MEX, Roth, Karlsruhe, Germany) agar at 25 °C in the dark or stated otherwise. S. sclerotiorum, B. cinerea, and R. solani have been described previously [16 (link),34 (link)]. The isolate Cercospora beticola 1437 is a verified isolate from a B. vulgaris CLS from a sugar beet field in lower Austria. The fungus was maintained on Czapek-Dox agar or PDA at 25 °C or otherwise stated. All other pathogenic strains were kindly provided by Agrana Research and Innovation Center (ARIC, Tulln, Austria).
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