You are not currently logged in.
Access JSTOR through your library or other institution:
If You Use a Screen ReaderThis content is available through Read Online (Free) program, which relies on page scans. Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
Physiological Mechanisms in the Synergism between Thifensulfuron and Imazethapyr in Sulfonylurea-Tolerant Soybean (Glycine max)
David M. Simpson and E. W. Stoller
Vol. 44, No. 2 (Apr. - Jun., 1996), pp. 209-214
Stable URL: http://www.jstor.org/stable/4045669
Page Count: 6
Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
Preview not available
Greenhouse and laboratory experiments were conducted to determine if the synergistic interaction between imazethapyr and thifensulfuron in sulfonylurea-tolerant (STS) soybean involved enhanced absorption and translocation or reduced metabolism of one or both herbicides. Thifensulfuron at 4.4 g ha⁻¹ and imazethapyr at 70 g ha⁻¹ caused 0 and 28% injury to STS soybean 7 DAT, respectively, while the combination of both herbicides caused 50% injury 7 DAT. Imazethapyr had no effect on absorption of ¹⁴C-thifensulfuron into the first trifoliolate. Imazethapyr did not affect absorption, translocation, or metabolism of ¹⁴C-thifensulfuron. Metabolism of ¹⁴C-thifensulfuron was rapid, with less than 10% remaining after 24 h, and was not affected by imazethapyr. Likewise, thifensulfuron did not affect the absorption, translocation, or metabolism of ¹⁴C-imazethapyr. Therefore, the synergism between thifensulfuron and imazethapyr does not involve changes in the absorption, translocation, or metabolism of either herbicide.
Weed Science © 1996 Weed Science Society of America