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Abstract

Background: Many alien plant species, such as Tithonia diversifolia, T. rotundifolia and T. tubaeformis, have been introduced to areas outside of their natural distribution range to provide benefits, but have subsequently become invasive, threatening biodiversity and agricultural productivity....

Author(s)
Witt, A. B. R.; Shackleton, R. T.; Beale, T.; Nunda, W.; Wilgen, B. W. van
Publisher
South African National Biodiversity Institute, Pretoria, South Africa
Citation
Bothalia - African Biodiversity & Conservation, 2019, 49, 1,
Abstract

Since 2016, the invasive fall armyworm (FAW), Spodoptera frugiperda, has been one of the most rapidly spreading and highly devastating maize pests across Africa and Asia. Although several studies have estimated the effect of FAW on maize yield, little is known about its impact on broader welfare...

Author(s)
Tambo, J. A.; Kansiime, M. K.; Rwomushana, I.; Mugambi, I.; Nunda, W.; Banda, C. M.; Nyamutukwa, S.; Makale, F.; Day, R.
Publisher
Wiley, Chichester, UK
Citation
Food and Energy Security, 2021, 10, 2, pp 299-312
Abstract

Background: Invasive alien species (IAS) cause significant economic losses in all parts of the world. Although IAS are widespread in Africa and cause serious negative impacts on livelihoods as a result of yield losses and increased labour costs associated with IAS management, few data on the...

Author(s)
Eschen, R.; Beale, T.; Bonnin, J. M.; Constantine, K. L.; Duah, S.; Finch, E. A.; Makale, F.; Nunda, W.; Ogunmodede, A.; Pratt, C. F.; Thompson, E.; Williams, F.; Witt, A.; Taylor, B.
Publisher
BioMed Central Ltd, London, UK
Citation
CABI Agriculture and Bioscience, 2021, 2, 18,
Abstract

Opuntia stricta (Haw.) Haw (Cactaceae) is invasive in Laikipia County, Kenya, impacting negatively on biodiversity and livelihoods. To control this invasive plant the biocontrol agent Dactylopius opuntiae (Cockerell) (Hemiptera; Dactylopiidae) 'stricta' biotype was released in 2014. A preliminary...

Author(s)
Witt, A. B. R.; Nunda, W.; Makale, F.; Reynolds, K.
Publisher
Springer, Amsterdam, Netherlands
Citation
BioControl, 2020, 65, 4, pp 515-523
Abstract

This is the first assessment of naturalised, invasive and potentially invasive alien plant species present in Laikipia County, Kenya, which hosts the highest populations of endangered large mammals in the country. We undertook broad-scale roadside surveys in Laikipia, recording all naturalised and...

Author(s)
Witt, A. B. R.; Nunda, W.; Beale, T.; Kriticos, D. J.
Publisher
South African National Parks, Pretoria, South Africa
Citation
Koedoe, 2020, 62, a1605,
Abstract

Background: Although Kenya has a relatively high number of registered biopesticide products, little is known about biopesticide use by smallholders. This paper documents farmers' current use and perception of chemical pesticides and biopesticides, their willingness to pay for biopesticides, and the ...

Author(s)
Constantine, K. L.; Kansiime, M. K.; Mugambi, I.; Nunda, W.; Chacha, D.; Rware, H.; Makale, F.; Mulema, J.; Lamontagne-Godwin, J.; Williams, F.; Edgington, S.; Day, R.
Publisher
Wiley, Chichester, UK
Citation
Pest Management Science, 2020, 76, 11, pp 3615-3625
Abstract

The semiaquatic weed Mimosa pigra has negative impacts on biodiversity, fishing, crop and livestock production, and tourism in most places where it has been introduced, established and proliferated. Many of the ecological impacts are well known, but its impacts on rural livelihoods are less well...

Author(s)
Witt, A. B. R.; Floyd, K. S.; Nunda, W.; Beale, T.; Shanungu, G.; Kriticos, D. J.
Publisher
Wiley, Melbourne, Australia
Citation
Austral Ecology, 2020, 45, 6, pp 788-799
Abstract

Background: Mimosa diplotricha is an emerging or established weed in many parts of the world, including many countries in Africa, where it is impacting on biodiversity, crop and pasture production, and driving socio-ecological change. Objectives: To establish the current distribution of M....

Author(s)
Witt, A.; Chimphepo, L.; Beale, T.; Nunda, W.
Publisher
South African National Biodiversity Institute, Pretoria, South Africa
Citation
Bothalia - African Biodiversity & Conservation, 2020, 50, a9, pp 51-63
Abstract

BACKGROUND: This paper documents farmer perceptions and management practices for fall armyworm (Spodoptera frugiderda J.E. Smith), providing a baseline for the development of sustainable pest management strategies. RESULTS: 91% of farmers correctly identified fall armyworm, and reported it as the...

Author(s)
Kansiime, M. K.; Mugambi, I.; Rwomushana, I.; Nunda, W.; Lamontagne-Godwin, J.; Rware, H.; Phiri, N. A.; Chipabika, G.; Ndlovu, M.; Day, R.
Publisher
Wiley, Chichester, UK
Citation
Pest Management Science, 2019, 75, 10, pp 2840-2850
Abstract

Invasive alien plant species such as Chromolaena odorata have negative impacts on biodiversity, ecosystem services and human well-being. Ecological impacts of this shrub are relatively well understood, but its impacts on local livelihoods and perceptions are poorly documented. We mapped C. odorata...

Author(s)
Shackleton, R. T.; Witt, A. B. R.; Nunda, W.; Richardson, D. M.
Publisher
Springer, Amsterdam, Netherlands
Citation
Biological Invasions, 2017, 19, 4, pp 1285-1298

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