RT Journal Article
SR Electronic
T1 Tolerance of native wildflower species to postemergence herbicides
JF Native Plants Journal
JO NATIVE PLANTS JOURNAL
FD University of Wisconsin Press
SP 31
OP 36
DO 10.3368/npj.12.1.31
VO 12
IS 1
A1 Wiese, Jessica L
A1 Keren, Elai N
A1 Menalled, Fabian D
YR 2011
UL http://npj.uwpress.org/content/12/1/31.abstract
AB Postemergence herbicides may facilitate weed control in native wildflower seed production fields. In a greenhouse study, we assessed the impact of 4 postemergence herbicides (linuron, halosulfuron, imazapic, and pendimethalin) on 4 wildflower species: white prairie clover (Dalea candida Michx. ex Willd. [Fabaceae]), blanketflower (Gaillardia aristata Pursh [Asteraceae]), silverleaf phacelia (Phacelia hastata Douglas ex Lehm. [Hydrophyllaceae], and prairie coneflower (Ratibida columnifera (Nutt.) Woot. & Standl. [Asteraceae]). Pendimethalin applied at 1.9 kg ai/ha (1.69 lb ai/ac) caused the least seedling injury across all species and therefore may help weed management in wildflower production systems. Although linuron applied at 0.56 kg ai/ha (0.5 lb ai/ac) appeared to be a promising alternative for weed control, oven-dry biomass for G. aristata was reduced by this herbicide. Imazapic and halosulfuron applied at 0.14 kg ai/ha (0.125 lb ai/ac) and 0.048 kg ai/ha (0.042 lb ai/ac), respectively, caused severe damage on wildflower seedlings.