Cross-resistance of primisulfuron-resistant Bromus tectorum L. (downy brome) to sulfosulfuron

Authors
Mallory-Smith, C Hendrickson, P Mueller-Warrant, G
Citation
C. Mallory-smith et al., Cross-resistance of primisulfuron-resistant Bromus tectorum L. (downy brome) to sulfosulfuron, WEED SCI, 47(3), 1999, pp. 256-257
Citations number
10
Categorie Soggetti
Plant Sciences
Journal title
WEED SCIENCE
ISSN journal
00431745 → ACNP
Volume
47
Issue
3
Year of publication
1999
Pages
256 - 257
Database
ISI
SICI code
0043-1745(199905/06)47:3<256:COPBTL>2.0.ZU;2-W
Abstract
A Bromus tectorum L. (downy brome) biotype with cross-resistance to sulfosu lfuron has been identified. The resistant biotype was selected with primisu lfuron in Poa pratensis L. (Kentucky bluegrass) plots near Madras, OR. The plots received two treatments of 20 g ai ha(-1) primisulfuron in the Fall o f 1993, 1994, and 1995. In 1995, control of B. tectorum decreased and green house studies confirmed that the biotype was resistant to primisulfuron. Cr oss-resistance to sulfosulfuron also was confirmed in greenhouse studies. M etabolism of sulfosulfuron rather than an insensitive site of action is the likely cause of the cross-resistance.