2Agridex (a mixture of 83 paraffin base petroleum oil and 17 surfactant blend). Helena Chemical Co., 5100 Poplar Ave., Memphis, TN 38137.
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