Grassland Legume Establishment with Imazethapyr and Imazapic

• DOI: 10.2134/agronj1999.914592x
• Publication Date: 2010-07-28T23:58:20Z
• Authors: Daniel D. Beran; Robert A. Masters; Roch E. Gaussoin
• Keywords: Lespedeza; Lotus corniculatus

Legumes are important components of grassland communities in North America and have potential to improve productivity diversity. Weeds can interfere with the establishment legumes increase probability stand failure. Four experiments were conducted from 1994 1997 determine if imidazolinone herbicides imazethapyr [2‐[4,5‐dihydro‐4‐methyl‐4‐(1‐methylethyl)‐5‐oxo‐1 H ‐imidazol‐2‐yl]‐5‐ethyl‐3‐pyridinecarboxylic acid] imazapic [(±)‐2‐[4,5‐dihydro‐4‐methyl‐4‐(1‐methylethyl)‐5‐oxo‐1 ‐imidazol‐2‐yl]‐5‐methyl‐3‐pyridinecarboxylic applied preemergence at 70 g a.i. ha −1 could reduce weed interference seeded legumes. Six native one introduced legume, crownvetch ( Coronilla varia L.), planted into prepared seedbeds sites near Mead, NE. Legume response varied among species sites. Crownvetch, partridgepea [ Chamaecrista fasciculata (Michx.) Greene; syn. Cassia chamaecrista purple prairieclover Dalea purpurea Vent.) exhibited tolerance both most their establishment, as indicated by stem density and/or forage yield collected 14 mo after planting, was improved when treated weedy environments. Imazapic treatment injured leadplant Amorpha canescens Pursh), Canada tickclover Desmodium canadense (L.) DC.], roundhead lespedeza Lespedeza capitata Michx.), resulting lower densities yields than applied. Based on these findings, application be used certain