Three-year field experiment (1999-2001) was conducted to determine the effectiveness of Treflan 480 EC herbicide (trifluraline) for common windgrass (Apera spica-venti) control applied directly after winter wheat sowing in mixtures with herbicides for grass and/or dicotyledonous weed control: Afalon Dyspersyjny 450 EC (linuron), Glean 75 DF (chlorsulfuron) and Stomp 330 EC (pendimethaline). Treflan 480 EC applied directly after winter wheat sowing followed by Mustang 306 SE (2,4-D + florasulam) applied in spring at wheat tillering period constituted the control. The best common windgrass and dicotyledonous weed control, yield increase and net profit were recorded for the mixture of Treflan 480 EC (1,25 dm³∙ha^-1) with Glean 75 DF (15 g∙ha^-1) applied in autumn, directly after winter wheat sowing.

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