Table 5.
Effectsa of harvest aids (treatments: paraquat, paraquat + carfentrazone-ethyl, carfentrazone-ethyl, NaClO3, glyphosate) on seed amino acids asparagine (ASP), threonine (THR), serine (SER), glutamine (GLU), proline (PRO), and glycine (GLY) (mg g−1) across two years. Untreated plants were used as the control. Harvest aids were applied at growth stages R6 and R7. The experiment was conducted in 2012 and 2013 in Stoneville, MS.
| Application at R6 | ||||||
| Treatment type | ASP | THR | SER | GLU | PRO | GLY |
| Untreated | 43.2 | 14.6 | 17.4 | 60.7 | 19.3 | 17.5 |
| Paraquat | 43.2 | 14.6 | 17.5 | 61.3 | 19.4 | 17.6 |
| Paraquat+ carfentrazone-ethyl | 43.0 | 14.5 | 17.1 | 61.6 | 19.2 | 17.0 |
| NaClO3 | 42.7 | 14.2 | 16.6 | 61.3 | 19.0 | 16.7 |
| Carfentrazone-ethyl | 43.1 | 14.4 | 17.0 | 61.1 | 19.2 | 17.4 |
| Glyphosate | 43.3 | 14.7 | 17.4 | 61.1 | 19.4 | 18.1 |
| LSD | 0.29 | 0.16 | 0.26 | 0.83 | 0.15 | 0.44 |
| Application at R7 | ||||||
| Treatment type | ASP | THR | SER | GLU | PRO | GLY |
| Untreated | 43.3 | 14.5 | 17.5 | 61.2 | 19.4 | 17.7 |
| Paraquat | 43.4 | 14.6 | 17.6 | 61.5 | 19.4 | 17.5 |
| Paraquat+ carfentrazone-ethyl | 42.8 | 14.6 | 17.5 | 60.1 | 19.4 | 17.5 |
| NaClO3 | 43.2 | 14.9 | 18.0 | 60.1 | 19.6 | 18.3 |
| Carfentrazone-ethyl | 42.8 | 14.6 | 17.4 | 60.4 | 19.1 | 17.4 |
| Glyphosate | 43.1 | 14.6 | 17.3 | 61.1 | 19.5 | 17.5 |
| LSD | 0.28 | 0.18 | 0.32 | 0.70 | 0.19 | 0.49 |
a LSD = Least Significant Difference test, significant at the 5% level. Within each column, the difference between two values is statistically significant if it equals or exceeds the corresponding LSD.