Abstract: Background: Provisia rice and glyphosate-resistant soybean can control imidazolinone(IMI)-resistant weedy rice (WR-R) and reduce the soil seedbank. Objective: We evaluated different systems to reduce the WR-R soil seedbank under analysis when adopting soybean and Provisia rice (PV). Methods: From 2017 to 2022, a field experiment in randomized block design with four repetitions was performed. In 2017-2018, WR-R and Clearfield® rice (CL) were sown in the area. From 2018 to 2022, twelve systems [including CL, Provisia (PV), non-CL rice (NCL) and Soy] were used: S1) PV-PV-PV-PV, S2) CL-CL-CL-CL, S3) PV-CL-PV-CL, S4) PV-PV-Soy-CL, S5) PV-PV-CL-CL, S6) PV-Soy-PV-Soy, S7) Soy-PV-PV-Soy, S8) Soy-PV-PV-NCL, S9) PV-PV-PV-NCL, S10) Soy-PV-PV-CL, S11) Soy-Soy-PV-PV, and S12) PV-Soy-PV-CL. The WR-R management were CL – imazapyr + imazapic, PV – quizalofop-p-ethyl, NCL – no specific treatment, and Soy – glyphosate. WR-R plant density and soil seedbank were evaluated during the experiment. The systems were analyzed by year and each system over the years and the means were compared (LSD, p<0.05). Results: Over the years, no WR-R plant escapes (100% control) were observed in the systems using soybean or PV. However, even after three years of using alternative systems, the return of CL rice allowed seedbank replenishment. Thus, our results suggest that it takes more than four years to deplete the seedbank. The systems in which soybean (S6, S7, and S11) were used for two years were more efficient for soil seedbank reduction. Conclusions: Systems alternating soybean and Provisia rice for more than four years are a strategy to reduce imidazolinone-resistant weedy rice soil seedbanks. Abstract Background glyphosateresistant glyphosate resistant imidazolinoneIMIresistant imidazolinone IMI WRR WR R (WR-R Objective . (PV) Methods 201 2022 performed 20172018, 20172018 2018, 2017-2018 Clearfield (CL area including PV, , nonCL non (NCL S1 S PVPVPVPV, PVPVPVPV PV-PV-PV-PV S2 CLCLCLCL, CLCLCLCL CL-CL-CL-CL S3 PVCLPVCL, PVCLPVCL PV-CL-PV-CL S4 PVPVSoyCL, PVPVSoyCL PV-PV-Soy-CL S5 PVPVCLCL, PVPVCLCL PV-PV-CL-CL S6 PVSoyPVSoy, PVSoyPVSoy Soy, PV-Soy-PV-Soy S7 SoyPVPVSoy, SoyPVPVSoy Soy-PV-PV-Soy S8 SoyPVPVNCL, SoyPVPVNCL NCL, Soy-PV-PV-NCL S9 PVPVPVNCL, PVPVPVNCL PV-PV-PV-NCL S10 SoyPVPVCL, SoyPVPVCL Soy-PV-PV-CL S11 SoySoyPVPV, SoySoyPVPV Soy-Soy-PV-PV S12 PVSoyPVCL. PVSoyPVCL CL. PV-Soy-PV-CL imazapic quizalofoppethyl, quizalofoppethyl quizalofop p ethyl, ethyl quizalofop-p-ethyl treatment LSD, LSD (LSD p<0.05. p005 p<0.05 0 05 p<0.05) Results 100% 100 (100 However replenishment Thus S6, (S6 reduction Conclusions imidazolinoneresistant seedbanks (PV 20 202 2017201 2017-201 p00 p<0.0 10 (10 (S 2 201720 2017-20 p0 p<0. 1 (1 20172 2017-2 p<0 ( 2017- p<