Africa

Thought Leadership Column by the Director General, Dr Segenet Kelemu

(Click here to read the French Version)

Over the recent past, a movement around the concept of Decolonising Knowledge has gained force across academic and international networks. The decolonial ideology is not new and in Africa, the philosophy was most prominent in the 1960s –1980s among postcolonial theorists, radical pan-Africanists and literary giants agitating for Decolonising the Mind, meaning liberation through endogenous, Africa-centred knowledge production.

The ideology gained new impetus in 2015 through a crusade led by South African students on Decolonising the University, which rapidly spread across the globe as a call to liberate curriculum and cultures in institutions of higher learning. This campaign spurred numerous others like decolonising the city, diets, architecture and even Hollywood.

The coordinates of decolonial thinking are contestations of institutions and structures of power that sustain relations of exploitation, inequalities, injustices, intersubjective, domination, repression and dispossession. Specifically, Decolonising Knowledge interrogates, challenges and aims to dismantle hierarchical models in systems of knowing resulting from political, economic and socio-cultural global inequalities.

Within the Decolonising knowledge debate, icipe occupies a unique practical and epistemic space as an African yet global institution; one that thrives on the ethos of equal, respective partnerships; and one that ascribes to the principles of the international scientific community while remaining committed to transformation of livelihoods across Africa. We believe that the goals of knowledge decolonisation are necessary, overdue and attainable.

Why now?

Ongoing global challenges like the need to accelerate attainment of the Sustainable Development Goals (SDGs), as well as the COVID-19 pandemic, have strengthened global awareness that ‘knowledge is power’. These issues  have also amplified longstanding cracks in international research and knowledge systems. And there is renewed consciousness that a  just, equitable, peaceful and prosperous world will not be possible without inclusive processes that draw on the intellectual capacity, talent, as well as desires and aspirations of people, especially the most vulnerable. This is happening against the background of a world that is growing weary of inequities and injustices, and the appreciation of movements of protest and more importantly, those of solidarity.

Points of contention

In Africa, Decolonising Knowledge requires contemplation and remedies of two sets of factors. The first category consists of functional aspects like how the research agenda is shaped, whose interests the research is conceived to serve and how it is conducted; who owns the knowledge produced, who has access to it and who benefits from it. The second group is composed of conceptual or epistemic aspects like the hegemonic notions that dictate what counts as knowledge, who legitimises it, who rewards it, and the remunerations that are granted, and to whom.

What needs to change?

From a living laboratory to a site of unity

Africa is an intriguing continent that has long fascinated researchers, innovators and investors alike, earning the continent the moniker of a living laboratory. This scenario has led to several thorny issues, for example perceived extractive behaviour of international “experts” and the subjugation of researchers in Africa to data collectors, logistic organisers and facilitators. Many of icipe’s globally collaborative research initiatives show that Africa can become a site of unity to produce the best knowledge for the greatest impact. In our partnerships, we contribute scientific and technological capacity; indigenous understanding of insect biodiversity; linkages to national and regional institutions and communities; and insights on developmental urgencies, agendas and aspirations. Our collaborators benefit from these vital perceptions and the opportunity to study insects in their actual environment, while complementing our expertise. Together, we harmonise our institutional mandates and visions.

Homegrown resources

The old adage holds: charity begins at home, and reducing over-reliance of African research institutions on external funding may well be the ultimate trump card for Decolonising Knowledge in Africa. As discussed in subsequent sections of this publication, the icipe-managed RSIF demonstrates how investments from African governments and international partners, as well as high-net-worth individuals, foundations and private sector across the continent, can be harnessed for Africa-led research and innovation priorities and doctoral training through innovative, participatory and effective intra-African and global collaborations.

International funding models

A disenfranchising factor, and one of the most deep-routed concerns in knowledge generation in Africa, is the structure of some funding models, for example those that assign research leadership and direction to organisations in the donor countries or regions. In effect, researchers in such institutions assume the role of principal investigators (PIs), with authority over most aspects of the project. Such stipulations may have several adverse impacts, for example depreciated role of researchers in developing countries, power and resource allocation asymmetries and diminished local ownership of initiatives. Regional standards are needed in Africa to guide funding models and provide a template to: ensure agency of local researchers and partners; equitable resource allocations that strengthen capacities, capabilities and infrastructure; ensure visionary research agenda; guarantee efficient project administration and implementation; and demonstrate return of investment, as is indeed the shared desire between us and our esteemed development partners.

Epistemic liberation

There are two schools of thought on the epistemic aspects of Decolonising Knowledge. The first calls for diversification of thought by mainstreaming marginalised geo-histories and ways of knowing. The second rationale aims for outright rejection of western thought and its alleged hegemonic authority. At icipe we remain committed to the international norms and standards of scientific research. Indeed, we argue for improved access by African researchers to global epistemic resources; the ‘knowledge’ to generate new ‘knowledge,’ including scholarly publications, journals and learning materials. While progress has been made through open-access publishing many such resources remain out of access for researchers in Africa, blocked by paywalls, copyrights and patents. Also, a shift from predominant funding of applied aspects, and more support for basic research in Africa will enable the continent’s scientists to follow their intellectual curiosities, participate in the excitement of scientific discovery and augment their contribution to scientific knowledge.

The Matthew effect

Excellence in knowledge production is often equated to publication in peer-reviewed journals, especially those with a high impact. At icipe, we consider this criteria an important indicator of our global recognition and reputation, and we are extremely proud of the growing quality and quantity of our publications. However, various studies have shown that the sole attention on metrics like number of publications, ranking or citations, reinforces hierarchies in knowledge production. Indeed, the over-focus on this approach often leads to the Matthew effect, a concept that describes the cumulative advantage accruing to some scientists, institutions and countries with comparative advantages for instance in terms of location, better capacity and resources. Conversely, this process leads to the marginalisation of scientists with lesser opportunities to publish. As such, the increasing calls for expanding the measures of scientific contribution to other factors like the relevance of research to national agendas and its socio-economic impact, are valid.

Decolonising the Decolonial Movement

Decolonisation of knowledge will require participation of all stakeholders. But concerns have been raised about the extent to which African intellectual communities are contributing to the theorisation that will eventually inform the outcomes of this movement. There is also a possibility that in many instances, inputs from African researchers are being mediated by northern institutions. The Decolonising Knowledge movement should be a call to action for us in Africa; we should not forfeit our right and responsibility to think and to theorise from our distinctive geographic and socio-cultural perspective.

 

*This article was first published for the icipe e-bulletin: Volume 11, Issue No. 1, 2021 (pdf). To republish any sections, please contact: icipe@icipe.org 

Review offers hope for breaking soilborne curse in Africa

Root-knot nematodes, a highly destructive group of soil dwelling worms that infect most, if not all cultivated crops, are probably one of the greatest threats to agriculture in SSA. Therefore, for the region’s food security goals to be achieved, these pests, alongside other nematode species, must be wholly integrated into efforts to improve agricultural productivity. Encouragingly, slow but steady progress made over the past 20 years indicates an optimistic outlook for an otherwise daunting endeavour.

These findings are presented in a review published recently by researchers from the International Institute of Tropical Agriculture (IITA), International Centre of Insect Physiology and Ecology (icipe), Kenya, Queen’s University Belfast, United Kingdom, University of Ibadan, Nigeria, Sugar Cane Research Institute, Tanzania, and Makerere University, Uganda.

The first of its kind in terms of scope, the study presents a thorough overview of nematode pests in SSA, locating this menace within the continent’s highly intricate agricultural landscape. As food requirements heighten in response to a rapidly rising population and escalating urbanisation, the need to intensify agricultural production in Africa is greater than ever. This scenario poses huge challenges in a region characterised by smallholder systems, diverse agroecologies, low agricultural productivity and increasing and adverse impacts of climate change. Moreover, intensified crop production in traditional sites as well as emerging peri-urban and urban systems leads to elevated pest and disease threats, and unattractive tradeoffs between food safety, health of people, animals and the environment, due to improper use of pesticides.

“Against this background, our review aims to provide knowledge to support comprehensive incorporation of nematode management as a critical component for sustainable intensification of agriculture in Africa,” notes Dr Danny Coyne,  soil health and nematology scientist, IITA. “We highlight aspects such as the nematode diversity, impact, obstacles and  the improving progress in this field to tackle them effectively.”

Complexity, damage and challenges

“This report highlights the complex, highly diverse community of nematodes in SSA, which makes it difficult to assess the importance or disease transmission potential of individual species,” says Dr Solveig Haukeland, nematologist, icipe. “The two most important groups are root-knot nematodes, known in short as RKNs, and lesion nematodes. In particular, RKNs, a pervasive group that is widely distributed across SSA, are hugely destructive and are considered among the world’s most damaging crop pathogens; a malignant soilborne curse, persistently undermining crop production.”

The study further provides an insight into the magnitude and complexity of the damage caused by nematode pests, including how infected plant roots prevent water and nutrient uptake. In addition, nematode infection leads to higher levels of root and tuber rot as a consequence of wounds caused by the pests feeding on plant roots. Nematodes have the ability to infect, feed on, and reproduce on an astonishing range of crops and plant species. These pests are also difficult to identify and because they have high reproductive and short generation times, they spread rapidly. Moreover, climate change will alter the geographical spread of nematode pests and lead to the emergence of new nematode problems.

Importantly, the significance of nematode pests in SSA is often obscured by their non-specific, cryptic disease symptoms, resulting in misdiagnosis or attribution to other causes or secondary infections. Further, across the continent, diagnostic capabilities for nematodes are limited, although the situation is gradually changing as expertise develops and more reliable scientific techniques become available. Nematology as a discipline is neglected, restricting the development of skilled capacity.

Farmers and agricultural staff typically have an inadequate understanding of nematodes or the expertise to manage them. Deficiencies in the availability of resistant varieties, use of quality agricultural inputs and improved farming techniques are other contributing factors to the spread of nematodes. In addition, the often unregulated nature of seed supply systems, as well as the informal exchange of infected planting material facilitates the spread of nematodes.

Nematode damage on crops

The researchers note that although no reliable estimates of economic losses due to nematodes in SSA are available, the impact of these pests is undoubtedly significant. This point is illustrated through case studies of the impact of nematodes on a range of crops important on the continent, as follows:

  • Banana (and plantain) is one crop that can be used to demonstrate the impact of nematodes on crop production in SSA. Unless tissue culture plants have been used, it is presumed that every banana plant is infected with nematode pests. Feeding by nematodes creates root necrosis and death. Damaged root systems result in weakened plant anchorage, poor bunch weight, inability to support stems and plant susceptability to weather elements.
  • Yam is affected by both lesion nematodes and RKNs, with the former traditionally more significant. The lesion nematode, Scutellonema bradys, causes dry rot disease. However, there is growing evidence of increasing incidence of RKNs on yam and higher levels of damage. Recently, the aggressive RKN species Meloidogyne enterolobii, was recovered from yam for the first time in Nigeria.
  • Maize lesion nematodes and RKNs, and numerous other nematode species may may occur simultaneously, causing significant damage to production. Cereals, including maize, are often mistakenly viewed as poor hosts of RKNs, perhaps because of the lack of the typical galling symptoms that Meloidogyne spp. cause..
  • Rice: The cyst nematode, Heterodera sacchari, has been recorded on upland rice in West Africa, causing serious losses and, potentially, represents a major constraint for regional rice production intensification.
  • Cassava, probably best known for its ability to withstand most afflictions, is generally viewed as being unaffected by nematodes. However, the naturally knobbly roots conceal RKN galling damage, and roots infected early in the season appear to deteriorate and die. The absence of infected roots at harvest disassociates nematodes from the significant yield loss that they cause.
  • Potato: Numerous nematode species and genera are reported from potato. In SSA, RKNs and lesion nematodes appear to be the most important. The recent discovery of the potato cyst nematode in Kenya illustrates the serious threat of nematodes to this crop.

Recommendations

To hasten progress in managing the nematode curse in SSA, it is necessary to create greater awareness of the pests and the damage they cause, across society.

"For example, adoption of innovations, such as traditional varieties that are genetically transformed to withstand nematode infection, would provide a formidable weapon in the battle against these pests. Indeed, formulating more conducive regulations for transgenic crops in SSA countries can become a real game changer in the fight against nematodes,” notes Dr Johnathan Dalzell, Lecturer, Queen’s University Belfast, School of Biological Sciences, Medical Biology Centre.

Regarding the capacity building and socio-economic context that frames soil health research in Africa and in particular on the nematology discipline, Dr Laura Cortada, soil health and nematology researcher, IITA concludes: “Although there has been considerable progress since 1985, there is great need to amplify and hasten efforts to deal with the threat of nematode pests. Based on the authors’ personal experiences in agriculture and capacity building in the region they make six key recommendations.”

  • Creation of public awareness and understanding across the agricultural landscape, including farmers, extension services, policymaking bodies, donors and development partners, academia and the scientific community.
  • Establishment of networks or platforms towards building a critical mass of nematology expertise, while generating relevant activities and publicity. Good practice examples include: Nematology platform developed through icipe and IITA Nematology Initiative for Eastern and Southern Africa Nematological Society of Southern Africa; Nigerian Society of Nematologists; and Specialised Nematology Training by Ghent University, Belgium.
  • Knowledge advances on nematode management needs to be fully integrated within agriculture, academia and policy.
  • Adequate coordination, motivation, and financial support is required to institute necessary agricultural policies.
  • Develop suitable, adoptable and relevant nematode management options, and make them available across SSA.
  • Stimulate wider and greater multidisciplinary interaction in open access journals, and beyond specialised scientific literature.

Notes for Editors

Publication details: Coyne D.L., Cortada L., Dalzell J.J., Claudius-Cole A. O., Haukeland S., Luambano N., Herbert Talwana H. (2018) Plant-Parasitic Nematodes and Food Security in Sub-Saharan Africa. Annual Review of Phytopathology, 56, https:// doi.org/10.1146/annurev-phyto-080417-045833

Infographic available here

Corresponding author: Danny Coyne – d.coyne@cgiar.org

Research collaborators: International Institute of Tropical Agriculture; Queen’s University Belfast, School of Biological Sciences, Medical Biology Centre, United Kingdom; Department of Crop Protection and Environmental Biology, University of Ibadan, Ibadan, Nigeria; International Centre for Insect Physiology and Ecology (icipe), Nairobi, Kenya; Sugar Cane Research Institute, Kibaha, Coast, Tanzania; and Department of Agricultural Production, School of Agricultural Sciences, Makerere University, Kampala, Uganda.

The International Institute of Tropical Agriculture (www.iita.org) is a not-for-profit institution that generates agricultural innovations to meet Africa’s most pressing challenges of hunger, malnutrition, poverty, and natural resource degradation. Working with various partners across sub-Saharan Africa, we improve livelihoods, enhance food and nutrition security, increase employment, and preserve natural resource integrity. IITA is a member of CGIAR, a global agriculture research partnership for a food secure future.

The International Centre of Insect Physiology and Ecology (www.icipe.org), headquartered in Nairobi, Kenya, is the only research institution in Africa working primarily on insects and other arthropods. icipe’s mission is to ensure better food security, health and livelihoods in Africa, by producing world-class knowledge and then developing solutions that are environmentally friendly, accessible, affordable and easy-to-use by communities. These objectives are delivered through four thematic areas — Human Health, Animal Health, Plant Health and Environmental Health. icipe gratefully acknowledges the financial support of the following core donors: Swiss Agency for Development and Cooperation (SDC); Swedish International Development Cooperation Agency (Sida); UK Aid, from the government of the United Kingdom; the Ministry of Higher Education, Science and Technology, Kenya; and the Government of the Federal Democratic Republic of Ethiopia. icipe’s research on nematodes includes: studies on the potato cyst nematode (PCN), conducted within the Food and Agriculture Organization of the United Nations (FAO) emergency assistance for the control of PCN project, focusing on the training of government technicians and determination of PCN status in soil samples. Ongoing activities on the potential of using the African nightshade as a ‘dead end trap crop’ for nematodes are funded by the Federal Ministry for Economic Cooperation and Development (BMZ), through the German Federal Enterprise for International Cooperation (GIZ). icipe is also involved in the Microbial Uptakes for Sustainable management of major bananA pests and diseases (MUSA) project, funded by the European Union Horizon 2020. The views expressed herein do not reflect those of these donors. For further information, visit: http://www.icipe.org/research/plant-health/research-nematodes