Efficacy and crop selectivity of saflufenacil alone and with partner herbicides for weed control in maize

Abstract

The recently developed herbicide saflufenacil was evaluated in six field trials between 2008 and 2011 for weed control in maize (Zea mays) crops Trial sites varied considerably in soil characteristics and weed spectrum No phytotoxicity or visual damage symptoms were observed in any of the six cultivars planted When used alone at 70 or 105 g ai/ha saflufenacil provided effective control of annual broadleaf weeds including atrazine and dicambaresistant fathen (Chenopodium album) but had little activity on grass weeds In combination with acetochlor both rates of saflufenacil provided good control of annual grass and broadleaf weeds in all but one trial In crops with a high weed pressure especially grass weeds a follow up postemergence herbicide would be required to maximise control Combinations of saflufenacil with up to 1200 g ai/ha of dimethenamidp were generally less effective than with acetochlor A strong negative relationship was evident between weed density and maize silage or grain yields

Control of glyphosate resistant Canada fleabane with saflufenacil plus tankmix partners in soybean

“…Saflufenacil can be used as a PP herbicide or desiccant for soybean in eastern Canada (Anonymous 2014). GR Canada fleabane and other herbicide resistant weeds, such as ALS resistant prickly lettuce (Lactuca serriola L.), can be controlled by saflufenacil (Liebl et al 2008;Soltani et al 2010;Trolove et al 2011); however, control of specific broadleaf weeds depends on application rate (Geier et al 2009;Soltani et al 2012). Furthermore, Mellendorf et al (2013) found that the control of GR Canada fleabane increased as the rate of saflufenacil increased from 25 to 50 g a.i.…”

Soil residual activity and plantback periods for the herbicides saflufenacil and topramezone

“…Two herbicides, saflufenacil and topramezone, were recently registered for weed control in New Zealand maize and sweet corn crops. Saflufenacil applied pre-emergence, in combination with acetochlor, provides good control of annual grass and broadleaf weeds (Trolove et al 2011), while topramezone, tank mixed with atrazine, has shown good efficacy on a mixed spectrum of annual broadleaf and grass weeds when applied post-emergence to maize crops (Rahman et al 2013). Saflufenacil is a new herbicide of the pyrimidinedione chemical class that acts by inhibiting the enzyme protoporphyrinogen IX oxidase (PPO) which in turn prevents chlorophyll biosynthesis (Grossmann et al 2010).…”

Simultaneous determination of saflufenacil and its two metabolites in soil samples by ultra‐performance liquid chromatography with tandem mass spectrometry

“…It can control more than 70 kinds of broadleaf weeds including troublesome and herbicide‐resistant broadleaf weeds, such as horseweed ( Conyza canadensis [L.] Cronq.) , giant ragweed ( Ambrosia trifida L.) in corn, soybean, and other crops when used alone or with other partner herbicides . Differently from glyphosate, saflufenacil is a selective herbicide, and the selectivity is based on physical placement and rapid metabolism in tolerant crop species .…”