1This research was supported in part by grants from Texas Peanut Producers Board.
Field studies were conducted to evaluate broadleaf signalgrass and southern crabgrass control and effect on peanut yield of clethodim alone and sequential applications with six broadleaf herbicides. When rated 9 wk after treatment (WAT), broadleaf signalgrass control with clethodim followed by (fb) acifluorfen, imazapic, or 2,4-DB 24 hr later did not differ from clethodim alone. When acifluorfen, acifluorfen plus bentazon, imazethapyr, imazapic, and lactofen were applied in a tank-mix with clethodim, broadleaf signalgrass control was less than 65%. Clethodim alone or clethodim plus 2,4-DB controlled 86 and 73% broadleaf signalgrass, respectively. When acifluorfen, acifluorfen plus bentazon, or imazethapyr was fb clethodim, signalgrass control was less than 72%. Southern crabgrass control was reduced in 2 of 3 yr from clethodim alone when acifluorfen was tank-mixed with clethodim. When other broadleaf herbicides were tank-mixed with clethodim, reduced crabgrass control was noted in only 1 of 3 yr. Where no POST herbicides were used, peanut yield was < 1600 kg/ha, while all plots which received a POST herbicide yielded over 2200 kg/ha.
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Keywords: antagonism, broadleaf signalgrass, Groundnut, postemergence, southern crabgrass
How to Cite:
Grichar, W. & Besler, B. & Brewer, K. & Baughman, T., (2002) “Grass Control in Peanut (Arachis hypogaea) with Clethodim and Selected Broadleaf Herbicide Combinations¹”, Peanut Science 29(2), p.85-88. doi: https://doi.org/10.3146/pnut.29.2.0002