by Staff Writers
Washington DC (SPX) Aug 29, 2016
Teams of scientists and labourers from the Department of Water Affairs in Botswana undertook a decades old challenge since the 1970s to combat invasive weeds in wetlands of Botswana, namely the Okavango Delta, off the Kwando-Linyanti-Chobe River and the Limpopo River. Continuous monthly surveys and monitoring of rivers, lagoons and other wetlands resulted in success and shall serve as inspiration in aquatic weeds management.
The review paper "Alien Invasive Aquatic Plant Species in Botswana: Historical Perspective and Management" describes the species biology, distribution, historical spread, negative impacts, and control achieved right from their discovery in Botswana.
The review presents success stories of control of salvinia, Salvinia molesta,by its biocontrol weevil, Cyrtobagous salviniae. No fresh releases of the weevil were undertaken after mass releases in 1999 and 2000,which got established in three years time.
It also presents the successful eradication of water lettuce, Pistia stratiotes, in the transboundary Kwando River wetlands by 2005. Management of the growth of water hyacinth, Eichhornia crassipes, from 2012 in the transboundary Limpopo River jointly with neighboring South Africa is also addressed in the review.
The review also looks at legislation regarding aquatic weeds. The Government of Botswana "regulates the movement and importation of boats and aquatic apparatus to prevent the importation and spread of aquatic weeds" by the strict implementation of "Aquatic Weed (Control) Act -1986".
The efforts made by the department have benefited tourism, water resource use, and wildlife. Partly due to the achievement of aquatic weeds control, the tourism sector is now very stable and contributes ca. 25% to the country's GDP.
The authors Kurugundla et al. suggest that integrating biological and physical control with public awareness campaigns while working with conservation groups and NGOs would provide sustainable development of wetlands for ecological integrity and livelihoods
Kurugundla. C. N.; et al. (2016). Alien Invasive Aquatic Plant Species in Botswana: Historical Perspective and Management, Open Plant Sci. J., DOI: 10.2174/1874294701609010001
Bentham Science Publishers
Farming Today - Suppliers and Technology
|The content herein, unless otherwise known to be public domain, are Copyright 1995-2017 - Space Media Network. All websites are published in Australia and are solely subject to Australian law and governed by Fair Use principals for news reporting and research purposes. AFP, UPI and IANS news wire stories are copyright Agence France-Presse, United Press International and Indo-Asia News Service. ESA news reports are copyright European Space Agency. All NASA sourced material is public domain. Additional copyrights may apply in whole or part to other bona fide parties. All articles labeled "by Staff Writers" include reports supplied to Space Media Network by industry news wires, PR agencies, corporate press officers and the like. Such articles are individually curated and edited by Space Media Network staff on the basis of the report's information value to our industry and professional readership. Advertising does not imply endorsement, agreement or approval of any opinions, statements or information provided by Space Media Network on any Web page published or hosted by Space Media Network. Privacy Statement|