The Control of a Highly Invasive Tree Cinchona pubescens in Galapagos

Red quinine tree has been recognized as a serious weed in the Galapagos National Park for three decades. During this time, a variety of control methods have been implemented, initially with poor results. In this article, we reviewed past efforts to control red quinine tree and tested a variety of he...

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Bibliographic Details
Published in:Weed technology 2004-01, Vol.18, p.1194-1202
Main Authors: Christopher E. Buddenhagen, Jorge Luis Renteria, Mark Gardener, Sarah R. Wilkinson, Mónica Soria, Patricio Yánez, Tye, Alan, René Valle
Format: Article
Language:English
Subjects:
Bark
Cambium
Diesel fuels
Experimentation
Gross national product
Herbicides
Stems
Tree stumps
Tree trunks
Vegetation
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Summary:Red quinine tree has been recognized as a serious weed in the Galapagos National Park for three decades. During this time, a variety of control methods have been implemented, initially with poor results. In this article, we reviewed past efforts to control red quinine tree and tested a variety of herbicides and selective application methods. A mixture of picloram and metsulfuron (240 and 15 g ai/L, respectively) killed 73 to 100% of trees when applied to connecting machete cuts around the circumference of tree trunks (hack and squirt [HS]) at concentrations of 5, 10, and 20% in water, with larger trees requiring higher concentrations for best results. Although this herbicide mixture also was effective when applied using other methods, HS was the least labor intensive and costly. The control methods developed could be used to combat this weed in other locations including Hawaii and Tahiti.
ISSN:0890-037X
1550-2740
DOI:10.1614/0890-037X(2004)018[1194:TCOAHI]2.0.CO;2