The paper reports the first results of vegetation experiments confirming the earlier observed in vitro sensitizing activity of extracellular elicitors of F. sambucinum FS-94 toward P. nodorum. The data of a small-plot field experiment showing a possibility of using FS-94 culture liquid containing these resistance-eliciting metabolites to reduce effective dosages of Folicure BT, EC 25% (a. i. tebuconazole and triadimefon, triazole derivatives) are also presented.

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