Increased foliar activity of clodinafop‐propargyl and/or tribenuron‐methyl by surfactants and their synergistic action on wild oat (Avena ludoviciana) and wild mustard (Sinapis arvensis)

Abstract

Increased foliar activity of clodinafop-propargyl and/or tribenuron-methyl by surfactants and theirsynergistic action on wild oat (Avena ludoviciana) and wild mustard (Sinapis arvensis) wbm_353 292..299Surfactants can improve postemergence herbicide efficacy and reduce the amount of herbicide required to obtain weed control.The effect of surfactants on the efficacy of herbicides is complicated and depends on the interaction among the plant, surfactant, and herbicide.The effects of surfactants on the efficacy of clodinafop-propargyl and/or tribenuron-methyl on wild oat (Avena ludoviciana) and wild mustard (Sinapis arvensis) under greenhouse conditions were investigated. In addition, the surface tension of aqueous solutions of the surfactants and surfactants + herbicides was determined. Significantly lower surface tension values were obtained with the aqueous solutions of citofrigate (Citogate plus Frigate) alone and with the herbicides used in this study.The citofrigate surfactant lead to the greatest enhancement of clodinafop-propargyl and/or tribenuron-methyl efficacy and the effect was species-dependent. The efficacy of clodinafop-propargyl and/or tribenuron-methyl in the presence of surfactants in controlling wild oat was higher than for wild mustard.The foliar activity of the tested herbicides rose with increasing surfactant concentrations.The tank mixture of clodinafop-propargyl and tribenuronmethyl showed a synergistic effect in controlling wild oat and wild mustard. The synergistic effect in controlling wild mustard was greater than for wild oat.

Increased Foliar Activity of Isoproturon+Tribenuron and Pyroxsulam Against Little Seed Canary Grass and Field Bindweed by Proper Adjuvant Selection in Wheat

“…These results are also in agreement with those by Aliverdi et al (2009). They reported that the tank-mix application of tribenuron-methyl and adjuvants have a synergistic effect to control weeds in wheat.…”

The effect of cationic and nonionic surfactants on the efficacy of ALS-inhibitor herbicides against Avena sterilis

“…Aliverdi et al (2009) 1). It is well established by experimental evidence that surfactants containing lower ethylene oxide units were more effective than surfactants containing higher ethylene oxide units in decreasing the static surface tension of spray solutions (Shah et al, 2015).…”

“…The static surface tension of aqueous solution of cationic and nonionic surfactant alone was measured as reported by Aliverdi et al (2009). The herbicides Nos.…”

Influence of selected soil-climatic parameters and application method of tribenuron methyl on biomass productivity and amino acids content in weeds

“…Previous papers have reported that environmental conditions affect the activity of tribenuron methyl and other sulfonylurea herbicides (Kudsk et al 1990, Olson et al 2000. It has also been reported that the impact of climatic factors depends on weed species and can be modified in tank mix with adjuvants (Mathiassen & Kudsk 2002, Bunting et al 2004, Stagnari et al 2006, Aliverdi et al 2009, Pannacci et al 2010. Adjuvants can improve herbicide efficacy because they enhance herbicide adhesion to the leaf surface, decrease the surface tension, prolong the droplet drying period and, therefore, allow more of the active ingredient to penetrate into the plant (Davies & Caseley 2001, Harbour et al 2003, Aliverdi et al 2009).…”

“…It has also been reported that the impact of climatic factors depends on weed species and can be modified in tank mix with adjuvants (Mathiassen & Kudsk 2002, Bunting et al 2004, Stagnari et al 2006, Aliverdi et al 2009, Pannacci et al 2010. Adjuvants can improve herbicide efficacy because they enhance herbicide adhesion to the leaf surface, decrease the surface tension, prolong the droplet drying period and, therefore, allow more of the active ingredient to penetrate into the plant (Davies & Caseley 2001, Harbour et al 2003, Aliverdi et al 2009). Adding a surfactant to the spray solution reduces the risk of herbicide failures under adverse soil-climate (Kudsk & Mathiassen 2007).…”