Document Type

Conference Proceeding

Publication Date

2012

Abstract

Aminocyclopyrachlor (MAT28) was investigated for the potential control of unwanted woody rootstocks of Chinese tallowtree (Triadica sebifera), sweetgum (Liquidambar styraciflua), and yaupon (Ilex vomitoria). A cutstump application of MAT28+Brush and Basal Oil by Helena was tested against standard treatments: (1) MAT28 2.5%, (2) MAT28 5%, (3) MAT28 10%, (4) MAT28 15%, (5) Garlon 4 Ultra 30%, (6) Garlon 4 Ultra+Stalker 20+1%, (7) MAT28+Stalker 10+1% and (8) untreated check. Herbicides were applied on February 4, 2009. Stems were severed with a chainsaw and herbicide applied immediately and sufficiently to thoroughly wet the surface, edges and top 2 inches of the stump. All rootstocks were free of sprouts 30 and 60 days after treatment (DAT). The total height of Chinese tallowtree checks averaged 8.8-feet initially and 7.5-feet 540 DAT. MAT28 (10%), MAT28+Stalker and Garlon Ultra mixtures all provided 100 percent control 540 DAT. For sweetgum, total height for check rootstocks averaged 11.8-feet initially and 5.9-feet 540 DAT. Least sprouting and best control occurred on rootstocks treated with Garlon Ultra alone. Sprouts averaged 2.4-feet 540 DAT. For yaupon, total height of checks averaged 11.1-feet initially and 4.8-feet 540 DAT. No sprouts (100 percent control) were detected 540 DAT on rootstocks treated with Garlon Ultra, Garlon Ultra+Stalker, or MAT28+Stalker. Cut-stump treatments of MAT28 show potential for reducing unwanted rootstocks of Chinese tallowtree, sweetgum and yaupon.

Comments

Yeiser, J. L.; Link, M.; Grogan, J. 2012. Screening cut-stump control of Chinese tallowtree, sweetgum and yaupon with aminocyclopyrachlor. In: Butnor, John R., ed. 2012. Proceedings of the 16th biennial southern silvicultural research conference. e-Gen. Tech. Rep. SRS-156. Asheville, NC: U.S. Department of Agriculture Forest Service, Southern Research Station. 389-393. http://www.srs.fs.fed.us/pubs/gtr/gtr_srs156/gtr_srs156_389.pdf

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