Abstract
Field experiments were conducted in North Carolina, Georgia, and Texas to determine if grass control is affected when postemergence-applied graminicides are mixed with 2,4-DB. Grass species evaluated included broadleaf signalgrass [Brachiaria platyphylla (Griseb.) Nash], goosegrass [Eleusine indica (L.) Gaertn.], johnsongrass [Sorghum halepense (L.) Pers.], large crabgrass [Digitaria sanguinalis (L.) Scop.], southern crabgrass [Digitaria ciliaris (Retz.) Koel.], and Texas panicum (Panicum texanum Buckl.). Mixing 2,4-DB with the graminicides reduced grass control 8 to 15% at five of 11 locations. The antagonism was not specific for a particular grass species or graminicide, and it was not restricted to grasses under adverse growing conditions. Applying the 2,4-DB 24 hours after graminicide application alleviated the antagonism. Applying the 2,4-DB 24 hours before the graminicides overcame the antagonism at three of the five locations.
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Keywords: Clethodim, fluazifop-P, quizalofop-P, sethoxydim, antagonism, herbicide mixtures, Brachiaria platyphylla, Digitaria ciliaris, Digitaria sanguinalis, Eleusine indica, Panicum texanum, Sorghum halepense
How to Cite:
York, A. & Wilcut, J. & Grichar, W., (1993) “Interaction of 2,4-DB With Postemergence Graminicides”, Peanut Science 20(1), p.57-61. doi: https://doi.org/10.3146/i0095-3679-20-1-15