Evaluating efficacy of preemergence soybean herbicides using field treated soil in greenhouse bioassays

Abstract Amid widespread occurrence of herbicide-resistant weeds in the United States, use PRE herbicides and cover crops have resurged once again as important strategies for weed management cropping systems. The objective this experiment was to evaluate length soil residual control from soybean detrimental impact these on crop species using field treated greenhouse bioassays. Greenhouse bioassays were conducted experiments 2018 2019 Arlington Lancaster, WI. consisted imazethapyr, chlorimuron-ethyl, cloransulam-methyl (acetolactate synthase [ALS] inhibitors); metribuzin (photosystem II [PS II] inhibitor); sulfentrazone, flumioxazin, saflufenacil (protoporphyrinogen oxidase [PPO] acetochlor, S -metolachlor, dimethenamid-P, pyroxasulfone (very long-chain fatty acid [VLCFA] a nontreated control. (depth, 0 10 cm) sampled at 0, 10, 20, 30, 40, 50 d after treatment (DAT). Palmer amaranth giant foxtail (weeds), radish cereal rye (cover crops) used bioindicators herbicide levels soil. Bioassay results showed extended with sulfentrazone pyroxasulfone; observed -metolachlor. Chlorimuron-ethyl most injurious shortly application, respectively, but minimal injury samples collected DAT, indicating fall-seeded southern Wisconsin can be compatible. These support growers practitioners selection effective reduced crops, altogether leading more effective, diverse, sustainable programs.