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Mikania micrantha Kunth (Asteraceae) (Mile-a-Minute): Its Distribution and Physical and Socioeconomic Impacts in Papua New Guinea

Day, M.D. and Kawi, A. and Kurika, K. and Dewhurst, C.F. and Waisale, S. and Saul-Maora, J. and Fidelis, J. and Bokosou, J. and Moxon, J. and Orapa, W. and Senaratne, K.A.D. (2012) Mikania micrantha Kunth (Asteraceae) (Mile-a-Minute): Its Distribution and Physical and Socioeconomic Impacts in Papua New Guinea. Pacific Science, 66 (2). pp. 213-223.

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Article Link(s): http://dx.doi.org/10.2984/66.2.8

Publisher URL: http://www.uhpress.hawaii.edu
Organisation URL: http://www.bioone.org

Abstract

Mikania micrantha or mile-a-minute is regarded as a major invasive weed in Papua New Guinea (PNG) and is now the target of a biological control program. As part of the program, distribution and physical and socioeconomic impacts of M. micrantha were studied to obtain baseline data and to assist with field release of biological control agents. Through public awareness campaigns and dedicated surveys, M. micrantha has been reported in all 15 lowland provinces. It is particularly widespread in East New Britain, as well as in West New Britain and New Ireland. A CLIMEX model suggests that M. micrantha has the potential to continue to spread throughout all lowland areas in PNG. The weed was found in a wide range of land uses, impacting on plantations and food gardens and smothering papaya, young cocoa, banana, taro, young oil palms, and ornamental plants. In socioeconomic surveys, M. micrantha was found to have severe impacts on crop production and income generated through reduced yields and high weeding costs, particularly in subsistence mixed cropping systems. About 89% of all respondents had M. micrantha on their land, and 71% of respondents had to weed monthly. Approximately 96% of respondents in subsistence mixed cropping systems used only physical means of control compared with 68% of respondents in other farming systems. About 45% of all respondents estimated that M. micrantha causes yield losses in excess of 30%. These studies suggest that there would be substantial benefits to landholders if biological control of M. micrantha were to be successful.

Item Type:Article
Funders:This project was funded by the Australian Centre for International Agricultural Research.
Corporate Creators:Department of Employment, Economic Development, and Innovation (DEEDI), Biosecurity Queensland, National Agriculture Research Institute, Wet Lowlands Island Program. PNG, PNG Oil Palm Research Association, Inc, PNG Cocoa and Coconut Research Institute, Secretariat of the Pacific Community, Land Resource Division. Suva, Fiji Islands
Business groups:Biosecurity Queensland
Additional Information:© 2012 by University of Hawaii Press.
Keywords:Mikania micrantha; mile-a-minute; invasive weed; biological control; food security; farmimg; productivity.
Subjects:Plant culture > Economic botany
Plant culture > Horticulture. Horticultural crops
Science > Invasive Species > Plants > Biological control
Deposited On:24 May 2012 05:50
Last Modified:24 Jul 2012 02:52

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