Two distinct theoreticalstreams flowing in the investigation,documentation, and dissemination ofMarginalized Peoples' Knowledge(s) (MPK)are identified and a third suggested.Systems thinking, which originally coined theterm Indigenous Knowledge Systems (IKS),continues to predominate the growinginterdisciplinary interest in MPK. Thisapproach has tended to view knowledge or itsproduction based on systemic principles.The asystems approach challenges theusefulness of MPK as a systemsconstruct. Its central proposition is that MPKdoes not always represent a coherent system ofknowledge with underlying principles.Asystemists tend to prefer the term LocalKnowledge (LK) and approach the (...) subject fromvery different, even opposing, epistemologicalassumptions. Although both the systemsand asystems research streams are oftenconcerned with power, an in-depth explorationof power-issues is not inevitably integral toeither approach. A third Subaltern Knowledge(s)(SK) perspective is suggested. The SK termembodies a central condition of many LKsvis-à-vis the scientific/Western knowledgeestablishment – that of being marginalizedbut resisting or with the potential to resistthis process. More benign terms in literature(IK, LK, Rural Peoples' Knowledge (RPK), etc.)fail to make this condition explicit. Such aconceptual recasting overtly invites aconsideration of the intertwined nature ofpower and knowledge in the exploration ofMPK. (shrink)

Differences in perceptions and knowledge of crop diseases constitute a major obstacle in farmer–researcher cooperation, which is necessary for sustainable disease management. Farmers’ perceptions and management of crop diseases in the northern Ethiopian Regional State of Tigrai were investigated in order to harness their knowledge in the participatory development of integrated disease management (IDM) strategies. Knowledge of disease etiology and epidemiology, cultivar resistance, and reasons for the cultivation of susceptible cultivars were investigated in a total of 12 tabias (towns) in (...) ten weredas (districts). Perception of diseases involved both scientific and spiritual conceptual frameworks. Of the more than 30 crop diseases recorded on the major crops in the region, only rusts and powdery mildews (locally called humodia) and a few root rots were considered by farmers to be important. Farmers’ awareness of other diseases was extremely low; some highly damaging but less conspicuous diseases, such as faba bean chocolate spot and chickpea ascochyta blight (also called humodia), were not regarded by farmers as disease but as problems caused primarily by excessive soil moisture. Considering that some of these “unrecognized” diseases can cause complete yield loss and genetic erosion in epiphytotic years, there is an urgent need for bringing together farmers’ and scientists’ knowledge to complement each other. Even when farmers had access to disease-resistant or disease-tolerant cultivars, they grew susceptible local varieties because of multiple criteria including earliness, good yield in years with low humodia severity, suitability for home consumption, market demand/quality, and low soil fertility and land management requirements. Farmer innovation and knowledge were evident in their use of diverse disease control measures, but these were a mixture of the “useful and the useless.” Our findings stress the necessity for extension workers and researchers to understand and improve farmers’ knowledge of crop diseases, and farmers’ ability to observe and experiment, through the Farmer Field School or a similar experiential learning approach. These insights about farmers’ knowledge of crop diseases provide a basis for further collaborative maintenance of crop genetic diversity, development of germplasm, and IPM-related research in Africa. (shrink)