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Innovation platforms (IPs) are a way of organizing multistakeholder interactions, marshalling ideas, people and resources to address challenges and opportunities embedded in complex settings. The approach has its roots in theories of complexity, the concept of innovation systems and practices of participatory action research. IPs have been widely adopted across Africa and beyond in recent years as a "must have" tool in a range of "for development" modes of agricultural research. Our experiences with establishing and facilitating nine IPs in local settings in west and central Africa contribute to understanding factors that impact on their effectiveness. The nine IPs were variously focused on developing dairy, crop and/or meat value chains by strengthening mixed crop-livestock production systems or seed systems. Using case study methods, we identified variables that contribute to explaining the performance of these IPs in relation to six domains of change in the agricultural system and the sustainability of changes. Thematic analysis was guided by a conceptual framework which grouped variables into four categories (context, structure, conduct, and process) that interact to influence IP performance. Stronger market connections and value chains were generated through some of these IPs but the most prevalent changes overall were in farm productivity and technical knowledge of producers. The structures evolved in some IPs, akin to those of producer collectives, suggested they were filling an institutional gap locally. The effect of the IPs on deeper level institutions that influence agricultural systems and food security was modest, constraining prospects for the IPs to generate impact at scale. Impacts from the IPs on research and development organisations were uncommon but had transformative significance. Our conceptual framework did not offer optimal guidance to understanding how the many variables that contributed to performance of these IPs combined and sequenced, but the pattern of interactions was consistent with increased social capital being the prime mediator for change. Achieving greater prospects for transformational

The study examined the functioning of the smallholder-produced teak poles value chain in Southern Benin from an analytical perspective combining the governance structure, the institutional environment, and the distribution of consumer price among chain actors. The objective was to identify bottlenecks militating against improved functioning of the farm-grown timber value chains. A fieldwork was carried from August 2008 to September 2010, to identify the agents and the organisations involved in the value chain. Data were collected on the functions performed, the costs borne and the income received by each category of agent, the marketing channels within the value chain, the interactions among agents, the consumption of the product, and the role of the organisations connected to the value chain. This was done by combining semi-structured interviews, focus group meetings, and structured interviews. In addition, data were collected on the institutional environment from both primary and secondary sources. The following agents were involved in the value chain: nurserymen, planters, local intermediaries, brokers, traders, and consumers. The forest service was the main governmental organisation involved in the functioning of the value chain. The governance structure in the value chain was driven by a mixture of government and the market. Various weaknesses were found in the forest policy, the forest regulation and their implementation. Planters' share of consumer price was lower than traders' return. The relevant policy options to address these issues were discussed.

We investigated if eco-friendly nets (EFNs) are a viable and acceptable alternative to extremely high levels of insecticide use in vegetable production. Using a choice experiment, we found that vegetable producing farmers in Benin preferred all of the characteristics of EFNs except the higher labor requirements. The nets had been distributed in a trial phase for free but in the long run farmers would need to purchase the EFNs. The break-even point for investing in nets was found to vary with the lifespan of EFNs, their purchase price and potential health benefits from avoiding large quantities of insecticides. To break even the nets need to be used for at least two production cycles. To overcome risk-averse farmer's reluctance to adopt EFNs we propose a credit and warranty scheme along with the purchase of the nets. The study's findings can guide the implementation of EFNs in other African countries as part of integrated pest management with global benefits for the environment and human health.

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Cabbage (Brassicaceae) is one of the most frequently consumed exotic vegetables in Benin and also the most affected by insects. To meet growing food demand, farmers rely heavily on synthetic pesticides that are harmful for themselves, consumers and the environment. Integrated pest management has been proposed as the means to improve vegetable productivity and quality in many developing countries. One approach is to substitute pesticides with physical barriers to insects, like nets. Here, we assess consumers' OPEN ACCESSEnvironments 2015, 2 450 perceptions about cabbage and their purchasing behavior towards cabbage that was produced using these nets in two major cities in Benin. Results indicate that consumers are aware of the health risks associated with intensive use of pesticides but were not able to recognize the quality difference between cabbage produced under nets from those using pesticides. All consumers were willing to pay a price premium for cabbage with minimized pesticides residues compared with conventionally produced cabbage, the average premium being 38%. Women, older, highly educated consumers and those able to distinguish cabbage qualities were willing to pay the most. We suggest that farmers will obtain higher prices if their production of cabbage with preferred characteristics is accompanied by an improved marketing strategy.

Culinary and sensory characteristics of sorghum crops and derived foods in northern Benin were investigated using rapid appraisal and quantitative survey methods. Three food categories were identified: pastes, porridges, and beverages. In the main town, all of these are encountered. In other areas, sorghum is mostly consumed as either paste or beverages. The major sensory quality attributes are related to texture, color, and taste. Brown or red sorghum types are generally used, because of food habits, beliefs, and appearance. We distinguished more than 100 farmers' varieties and classified them according to their suitability for the preparation of different sorghum-based foods.