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COMMON HONEYLOCUST CONTROL USING FOLIAR-APPLIED HERBICIDES
Author
Fick, Walter H.
Publisher
Society for Range Management
Publication Year
2014
Body

Common honeylocust (Gleditsia triacanthos) is a native, deciduous tree of the legume family.  It is found throughout most of the U.S. along streams, rich bottomlands, rocky hillsides, fence rows, and pastures and can reach nearly 40 m in height.  Common honeylocust has bipinnately compound leaves with sharp thorns on the twigs and bark. Pods are eaten by both wildlife and domestic animals.  Common honeylocust is a prolific resprouter and has the ability to spread quickly.  The objective of the study was to determine the efficacy of eight foliar herbicides applied for common honeylocust control.  Two study sites were selected in Pottawatomie County, Kansas.  Trees were 1 to 3.5 m tall.  The foliar treatments were applied in 467 L ha-1 spray solutions using a backpack sprayer.  A non-ionic surfactant at 0.25% was added to each foliar treatment.  A total of 11 to 27 trees per treatment were foliar sprayed on July 21, 2011 and July 18, 2012.  Mortality was determined from all treatments about 1 year after application.  Chi square analysis was used to determine differences among treatments at the 0.10 level of significance.  Control of common honeylocust was not different between locations for any herbicide in 2011, but in 2012 aminocyclopyrachlor + metsulfuron at 0.9 + 0.2 g L-1  and picloram + fluroxypyr at 0.4 + 0.4 g L-1 provided greater control at site 1.  The only foliar treatments providing greater than 90% control both years were picloram + fluroxypyr at 0.8 + 0.8 g L-1,  aminopyralid at 0.3 g L-1,  and aminocyclopyrachlor + metsulfuron at 0.9 + 0.2 g L-1 .    Other treatments providing greater than 80% control both years included picloram + fluroxypyr at 0.4 + 0.4 g L-1 and triclopyr at 2.4 g L-1.  Dry weather during 2012 reduced control of common honeylocust by some herbicides.

Language
English
Resource Type
Text
Document Type
Conference Proceedings
Conference Name
SRM Orlando, FL
Collection
SRM Annual Meeting Abstracts