Evaluation of 2, 4-D Amine, Glyphosate, 2, 4-D Amine plus Glyphosate DMA and 2, 4-D Choline/Glyphosate DMA for Their Efficacy on Glyphosate Susceptible and Resistant Canada Fleabane Populations.

Citation

Ford, L., Soltani, N., Robinson, D.E., Nurse, R.E., McFadden, A., and Sikkema, P.H. (2014). "Evaluation of 2, 4-D Amine, Glyphosate, 2, 4-D Amine plus Glyphosate DMA and 2, 4-D Choline/Glyphosate DMA for Their Efficacy on Glyphosate Susceptible and Resistant Canada Fleabane Populations.", Agricultural Sciences, 5(11), pp. 1053-1060. doi : 10.4236/as.2014.511114

Abstract

The 2,4-D choline/glyphosate DMA formulation has reduced drift and volatility compared to the amine or ester formulation of 2,4-D and therefore is advantageous compared to a tank mix of 2,4-D amine or ester with glyphosate. The objective of this research was to compare the control of glyphosate susceptible and glyphosate resistant Canada fleabane with 2,4-D choline/glyphosate DMA with 2,4-D amine, glyphosate, and a tank mix of 2,4-D amine and glyphosate. Ten rates of 2,4-D amine (0 - 6708 g•ae•ha-1), glyphosate (0 - 7052 g•ae•ha-1), a tank mix of glyphosate plus 2,4-D amine (0 - 7052 g•ae•ha-1 + 0 - 6708), and 2,4-D choline/glyphosate DMA (0 - 13760 g•ae•ha-1) were examined in the greenhouse for the control of two susceptible (GS) and two resistant to glyphosate (GR) Canada fleabane biotypes. The tank mix of 2,4-D amine plus glyphosate and 2,4-D choline/glyphosate DMA provided equivalent control of the GR Canada fleabane biotypes at 35 days after the application (DAA). The 2,4-D choline/glyphosate DMA treatment was more efficacious than the tank mix on the GS biotypes. Glyphosate (880 g•ae•ha-1) provided 50% and 100% control of the resistant and susceptible biotypes, respectively. The 2,4-D choline/glyphosate DMA formulation and the tankmix of 2,4-D amine and glyphosate provided similar control of GR Canada fleabane.

Publication date

2014-12-31

Author profiles