John Rawls est souvent perçu comme un partisan de politiques redistributives visant à apaiser les conséquences d'une économie capitaliste qu'il ne remettrait pas en cause. Cet article montre qu'il s'agit là d'un préjugé et donne un aperçu de la transformation du paysage des entreprises qu'impliquerait une société juste aux yeux de Rawls. Nous commentons les régimes économiques qu'il esquisse dans son œuvre et rappelons que le libéralisme égalitaire a en vérité des implications profondes et souvent insoupçonnées en ce qui concerne la propriété et la gestion des entreprises. Pour Rawls, la démocratie de propriétaires implique que les citoyens possèdent tout au long de leur vie des parts sociales dans les entreprises tandis que le socialisme libéral suppose la nationalisation des moyens de production et la socialisation de leur gestion.

“Diversity” is the focus of a wide-ranging corpus of normative discourses, institutional structures, policies and practices in business, public sector agencies, the military, universities and professions. Here, a brief account of the rise and diffusion of the term is provided. It now addresses a wide variety of social differences, while at least six distinct facets or goals of diversity policy can be discerned. Ambiguity, multivocality and banality are key characteristics of diversity discourse, but these function to strengthen, rather than weaken, the spread and acceptance of the notion. In many settings the commitment to diversity is mainstreamed, expected, and even taken-for-granted. Diversity discourse is related to ongoing processes of social diversification, but its diffusion is not driven by these processes. Overall, despite its many imprecisions, the impacts of the diversity corpus entail a transformation, or at least refinement, of the social imaginary.

The red palm weevil (RPW) Rhynchophorus ferrugineus (Olivier), a concealed tissue borer, is a lethal pest of palms and is reported to attack 17 palm species worldwide. Although the weevil was first reported on coconut Cocos nucifera from South Asia, during the last two decades it has gained a foothold on date palm Phoenix dactylifera in several Middle Eastern countries from where it has moved to Africa and Europe, mainly due to the movement of infested planting material. In the Mediterranean region, RPW also severely damages Phoenix canariensis. Currently, the pest is reported in c. 15% of the coconut-growing countries and in nearly 50% of the date palm-growing countries. Infested palms, if not detected early and treated, often die. However, palms in the early stages of attack respond to chemical treatment with insecticide. RPW has been managed in several countries employing an integrated pest management (IPM) strategy including the use of food-baited pheromone traps. Early detection of infestation in the field is important for the success of any RPW-IPM programme. Ideally, movement of planting material from infested plantations within the country and also from one country to another needs to be stopped. Wherever this is not possible, it is essential to implement strict pre- and post-entry quarantine regimes, wherein only pest-free and certified planting material can be transported. The existing pheromone-based IPM programme can be strengthened by intensifying the search for effective natural enemies, coupled with the introduction of resistance in palms to RPW. This article reviews the work done during the last 100 years on various aspects of RPW viz. life history, damage and symptoms of attack, seasonal activity, spatial distribution, host range, IPM and its main components, including trapping adult weevils and chemical control, besides biological control, host plant resistance and male sterile technique.

Introduction. Litter on the ground is a primary source of Botrytis cinerea inoculum in boysenberry (Rubus hybrid) gardens. The effect of litter management on primary inoculum production, and flower and berry infections was determined. Materials and methods. A series of experiments ranging from laboratory to large-scale field evaluations were conducted in New Zealand during 1997-2002 to evaluate litter management options for control of B. cinerea. The laboratory trial investigated the effect of litter size (shredded vs. unshredded litter) and debris amendments on tissue degradation and B. cinerea colonization. The field trial (four sites) investigated the effect of litter amendments (compost, urea and fungicide) and piling litter on B. cinerea sporulation. In the 4-year commercial-scale study (three properties), the effect of litter treatment (piling, compost and microbial extracts/suspensions) on primary inoculum, flower and berry infections was assessed. Results and discussion. The laboratory trial showed that bark + sewage sludge compost amendment enhanced litter decomposition and reduced B. cinerea sporulation on infected tissue after 8 weeks. The field trial indicated that piling of shredded boysenberry debris was more important than litter amendments in reducing the amount of B. cinerea harbored within the litter. Commercial field-scale evaluation of litter management options verified that piling of shredded litter is the most important step in B. cinerea inoculum control from debris. It also showed that microbial litter amendments (compost, solutions or extracts) can be beneficial. While B. cinerea inoculum control also reduced the amount of flower infections, berry infections at harvest were not affected, indicating that other sources of B. cinerea inoculum contribute to berry infection post-flowering.

A study of microhabitat use by fourteen abundant fish species was undertaken in the lower Ntem River Basin in Cameroon (Africa). Seventy-one microhabitats including pools, raceways and riffles were studied twice during the 1994 and 1995 dry season. Results obtained by Canonical Correspondence Analysis (CCA) showed a good niche separation along the ordination axes I (λ1 = 0.37) and II (λ2 = 0.20). Microhabitat selection by these species reflects response to several physical factors including width, depth, current velocity and substrate type. However, a substantial part of the variation in species segregation was explained by both instream (% leaves, woods and roots, and aquatic plants) and bankside (% mean canopy closure)cover. A striking pattern encountered during this study was the frequent size-related variation in habitat use displayed by many species. For example, smaller individuals of Brycinus longipinnis, Barbus camptacanthus, Distichodus notospilus, and D. hypostomatus, occurred more often in faster flowing waters than did their larger conspecifics. The association displayed by CCA was high (0.957 and 0.938, respectively for the first and second axis), and Monte Carlo test (99 permutations) revealed that these associations were significantly different from random (p = 0.01). The implications of these results for habitat management are discussed.

Insect rearing and its management is a prerequisite in developing IPM packages for various food crops. Insects reared for the development of these packages should be regularly monitored for quality in order to ensure success. This paper describes various methods of rearing followed at the ICIPE in the process of IPM development. The rearing of Chilo partellus is described as an example of large-scale rearing. Steps in the experimental rearing of Busseola fusca are outlined. The rearing of an egg parasitoid, Trichogramma mwanzai is described as a vital technology in the IPM of maize and sorghum. The value of quality control is emphasized using the rearing of the phytoseiid mite, Neoseiulus teke as an example.

In the years prior to independence, farmers had access to the international market through the production of export crops which at that time received considerable input from research. Access to export crops has dwindled, support for research by national governments is disappointing, human resource development is inadequate, donor funding is uncoordinated, and the food crisis has taken on political dimensions. The assumption that direct importation of western technology can solve the problems of Africa is no longer valid in the face of several failures. The challenge to national agricultural research systems and the problems associated with the generation or adapting of farmer-oriented, location-specific technologies for sustaining agricultural production are discussed. Examples are drawn from India and an agenda for action, involving national governments, the international agricultural research centres and donors, in resolving these problems is presented.