Fenclorim Increasing Butachlor Selectivity between Wheat and Roegneria kamoji by Seed Soaking

Roegneria kamoji Ohwi (Poaceae), a wild relative plant of wheat which is widely distributed across China, has become dominant and problematic weed in fields some regions. We have previously confirmed that R. highly tolerant to foliar-applied acetyl-CoA carboxylase (ACCase) acetolactate synthase (ALS) inhibitors (Triticum aestivum L.). The sensitivity pre-emergence (PRE) herbicides the basis fenclorim increase selectivity butachlor between were evaluated this study. Screenhouse bioassay showed exhibited similar PRE at their recommended field doses (RFD); it also buatchlor provides highest control for (53.4% emergence 81.5% fresh weight reduction, respectively), while had no impact on seedling among six herbicides. When was applied four-fold RFD, seedlings emerged; however, significantly reduced above-ground biomass compared with non-treated control. Pre-treatment herbicide safener by seed soaking increased ED10 value from 221.8 1600.1 g a.i. ha−1, thus increasing index 9.6 68.9 kamoji. activities α-amylase activity protein content during germination, glutathione-S-transferase (GST) β-ketoacyl-CoA (KCS) seedlings, could be induced both seeds or without pre-soaking. These results suggested did not affect germination wheat. fenclorim-increased associated GST KCS-mediated enhanced metabolism