Propoxycarbazone-sodium and imazapic effects on downy brome (Bromus tectorum) and newly seeded perennial grasses
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Authors: G. M. Sbatella, R. G. Wilson, S. F. Enloe, and C. Hicks
Date: 2011
Journal: Invasive Plant Science and Management
Volume: 4
Number: 2
Pages: 78-86
Summary of Methods: The effects of propoxycarbazone-sodium (labeled for downy brome control in small grains) and imazapic on downy brome and perennial grasses were evaluated in a study conducted at three rangeland sites in Colorado and Nebraska. A second study was conducted in Lingle, WY and Scottsbluff, NE to determine a proper plant-back interval and post-emergence herbicide application when planting perennial grasses.
Article Summary / Main Points: Rangeland Study: 1. Propoxycarbazone-sodium provided satisfactory Downy brome control and also caused injury to desired grasses less than or equal to that caused by imazapic when rainfall followed the fall application. Perennial Grass Response Study: 1. Perennial grass tolerance to both herbicides was good when applied 90 and 120 days before planting. 2. Perennial grass injury increased as plant-back interval decreased. 3. Herbicide applications at or immediately after planting had greatest negative impact on seeded species.
Vegetation Types: Shortgrass Prairie
MLRA Ecoregions: Unknown
Agrovoc Control Words: Annual grasses Weeds Bromus techtorum
Article Review Type: Refereed
Article Type: Experimental Research
Keywords: perennial forage, seedling establishment, moisture, application timing
Annotation: This article provides important information on a new herbicide (propoxycarbazone-sodium) as a potential downy brome control. It also provides information on timing of application to minimize perennial grass injury for both imazapic and propoxycarbazone-sodium.
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