Drawing from nine years of IPM Collaborative Research Support Program (CRSP) on-farm participatory assessment and research, a laminated series of 18 posters was developed for Peace Corps work with Malian farmers. This series transmitted to non-reader subsistence farmers an IPM package for protecting postharvest cowpeas. IPM technologies included locally-produced seed kernel powder of the neem tree, Azadirachta indica, solarization, triage, and appropriate containment.The poster series, with interpretive paragraphs in English and Bambara on the back of each poster, taught biology of Callosobruchus maculatus, the main pest of cowpeas after harvest. Other messages were about safety from fungi and mycotoxins and the nutritional and economic importance of maintaining cowpea quality during storage. Cowpeas are a main source of protein for the rural population (70% of total Malian population). All 2004 Peace Corps Volunteers (PCVs) in the Ag and Natural Resources Sector of Mali were given this poster packet and hands-on training in the four IPM technologies in the packet by the four authors during standard training of the Volunteers. Four uptake interviews were conducted with 2003 PCVs. The uptake evaluation instrument was revised and given to 29 2004-PCVs following our hands-on training and their own self-study. Numerical results were evaluated with ANOVA and means comparisons. The unique aspect of this dissemination method is that it is stand-alone teaching. Each PCV was then able to share this farmer-generated IPM packet with their village, ca. 300 farmers, which is potentially 8,700 subsistence Malian farmers per year.