Winter Wheat (Triticum aestivum) Response to Picloram and 2,4-D

Abstract

Postemergence spring applications of picloram and picloram plus 2,4-D frequently reduced mature height and peduncle length of hard red winter wheat in field experiments. Yield reductions were more severe from picloram applied alone to the first joint growth stage than late tillering stage wheat. In two of six experiments picloram plus 2,4-D reduced yield more than picloram alone. Yields of four wheat cultivars were reduced by picloram and picloram plus 2,4-D at one of two locations. At the second location only the yield of ‘Chisholm’ and ‘Rohm and Haas Seed 7837’ were reduced by those herbicides.

Reactive oxygen species‐mediated enzymatic systems involved in the oxidative action of 2,4‐dichlorophenoxyacetic acid*

“…2,4‐dichlorophenoxyacetic acid (2,4‐D) is a phenoxycarboxylic acid belonging to this kind of herbicides, together with other substances such as naphthalene acids, benzoic acids, and pyridine‐ and quinoline‐carboxylic acids. At high concentrations, 2,4‐D acts as a herbicide on dicotyledoneous plants, and it has been used for several decades in cereal crops (Aberg & Eliasson 1978; Heering & Peeper 1991; Johnson & Murphy 1991; Sterling & Hall 1997). However, at low concentrations, is broadly used in in vitro plant tissue culture for induction of calli formation and as a somatic embryogenesis stimulating substance due to its similarity to auxins (Bronsema et al .…”

Enhanced host–guest electrochemical recognition of herbicide MCPA using a β-cyclodextrin carbon nanotube sensor

“…Phenoxy acid herbicides showing auxin-like activity have been extensively used to control the growth of grass and broad-leaf weeds in many crops, such as rice [4], winter wheat [5,6], soybean [7], etc. The chlorophenoxy herbicide MCPA (4-chloro-2-methylphenoxyacetic acid) is widely used for the control of broad-leaf weeds primarily in cereal and grass seed crops [8][9][10].…”