Soybean Response to Residual and In-Season Treatments of Trifloxysulfuron

Abstract

Experiments were conducted from 1998 to 2000 at Rocky Mount, NC, in weed-free environments to determine soybean tolerance to preplant (PP) applications of trifloxysulfuron and the potential for trifloxysulfuron applied preemergence (PRE) and postemergence (POST) to cotton to injure soybean grown in rotation the following year. Trifloxysulfuron at 3.75 and 7.5 g ai/ha applied PP 2 wk before seeding injured conventional soybean less than 5%, whereas no injury was observed when seeding was delayed 4 or 6 wk after PP treatment. No injury to sulfonylurea-resistant soybean (SR) was observed for any treatment. Soybean yields were not influenced by trifloxysulfuron treatment. Cotton injury was 7% or less with trifloxysulfuron applied PRE or POST at 3.75 and 7.5 g/ha. Trifloxysulfuron at 15 g/ha PRE or POST injured cotton a maximum of 14 to 18%. Trifloxysulfuron did not reduce cotton lint yields regardless of method or rate of application. Both conventional and SR soybean were not injured nor were yields influenced by trifloxysulfuron applied PRE or POST the previous year to cotton.

Postemergence Southern Crabgrass (Digitaria Ciliaris) Control with Sulfonylurea Herbicides

“…Beam et al (2004) stated that a preemergence application of flazasulfuron at 0.034 kg/ ha injured two seeded bermudagrass varieties, 'Riviera' and 'Yukon' 90%. In studies addressing the soil-residual nature of trifloxysulfuron, conventional soybeans were injured , 5% when no more than trifloxysulfuron at 0.007 kg/ha was applied 2 wk prior to planting (Porterfield et al 2006). Also, tobacco developed minimal or no injury symptoms to pretransplant applications of trifloxysulfuron applied at the same rate (Porterfield et al 2005).…”

“…In each of these studies, no adverse effects to crop yield were observed. Although the Porterfield et al (2005Porterfield et al ( , 2006 trials did not primarily focus on weed control in turfgrass, it could be speculated that the shortlived soil residual activity of these sulfonylurea herbicides would have little to no effect on southern crabgrass emerging from seed. However, additional research would need to be performed to determine if residual control of southern crabgrass seed could be achieved with these two sulfonylurea herbicides.…”

Biological, surface, and wetting behavior of bio‐surfactants tank‐mixed with trifloxysulfuron‐sodium on Sorghum halepense

“…The potential of the carryover injury of trifloxysulfuron‐sodium applied in cotton on succeeding crops, e.g. soybean, corn, rice, grain sorghum, forage radish, and crimson clover, has been proven in many previous studies, demonstrating the need to use reduced doses 3–6 . Although chemical weed control is easy, effective, and affordable, it is constantly undergoing increasing scrutiny.…”

“…soybean, corn, rice, grain sorghum, forage radish, and crimson clover, has been proven in many previous studies, demonstrating the need to use reduced doses. [3][4][5][6] Although chemical weed control is easy, effective, and affordable, it is constantly undergoing increasing scrutiny. Overall, the public perception of synthetic herbicides is poor due to side effects on nontarget organisms, water pollution, and crop herbicide residues.…”

The Application Time-of-Day Effect for Trifloxysulfuron Against Velvetleaf as Affected by Nozzle Type

“…(O'Berry et al, 2008;Salimy et al, 2008), a weed causing cotton yield loss up to 80% at a density of 12 plants m -2 (Ghorbanpour et al, 2014). Trifloxysulfuron is not rapidly degradable, resulting in carryover injury on succeeding crops (Dvorkin et al, 2012;Minton et al, 2008;Porterfield et al, 2006;Rector et al, 2020). Moreover, the strong selection pressure it exerts on sensitive biotypes leads to the evolution of trifloxysulfuron resistance in some species (Brosnan et al, 2015;Francischini et al, 2014a, b), but that has not happened in velvetleaf yet.…”