Comparison of Experimental Strategies to Control Torpedograss

Hanlon, Charles G. and Langeland, Ken (2000) Comparison of Experimental Strategies to Control Torpedograss. Journal of Aquatic Plant Management, 38, pp. 40-47.

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Studies were conducted to evaluate whether the herbicide imazapyr or a combination of imazapyr and fluridone could be used effectively to control torpedograss ( Panicum repens L.), an exotic perennial plant that has replaced more than 6,000 ha of native vegetation and degraded quality wildlife habitat in Lake Okeechobee, Florida. Torpedograss was controlled for more than one year in some areas following a single aerial treatment using 0.56, 0.84, or 1.12 kg acid equivalents (ae) imazapyr/ha. Combining imazapyr and fluridone did not increase the level of torpedograss control. In areas where plant biomass was reduced by fire prior to being treated with 0.84 or 1.12 kg ae imazapyr/ha, torpedograss was controlled for more than two years and native plant species, including duck potato ( Sagittaria lancifolia L.) and pickerelweed ( Pontederia cordata L.) became the dominant vegetation in less than one year. Although torpedograss was controlled in some areas, little or no long-term control was observed at 16 of the 26 treatment locations. To reduce the uncertainty associated with predicting long-term treatment affects, additional studies are needed to determine whether environmental factors such as periphyton mats, plant thatch, hydroperiod and water depth affect treatment efficacy. , he

Item Type: Article
Title: Comparison of Experimental Strategies to Control Torpedograss
Personal Creator/Author:
Hanlon, Charles G.
Langeland, Ken
Refereed: Yes
Journal or Publication Title: Journal of Aquatic Plant Management
Volume: 38
Page Range: pp. 40-47
Date: 2000
Latitude: 26.9378
Longitude: -80.8123
Issuing Agency: Aquatic Plant Management Society, Inc.
Uncontrolled Keywords: Panicum repens , herbicide, imazapyr, fluridone, Lake Okeechobee, burning, torpedograss, invasive aquatic plants
Subjects: Management
Item ID: 1837
Depositing User: Stephanie Haas
Date Deposited: 14 Feb 2009 15:46
Last Modified: 29 Sep 2011 20:00

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