Variety screening studies require a consistent supply of large quantities of these pests at specified time periods. Stem borers are reared on an artificial diet in order to have dependable large and continuous supplies of insects for screening plant materials. The stem borer and post-harvest rearing facility has a significant impact on research focused at managing post-harvest insects and maize stem borer populations through host plant resistance. The rearing facility supports national and international research projects aimed at developing maize varieties that can be incorporated in integrated pest management of stem borers and post-harvest pests of maize. This manual will describe the methods used to rear stem borers, maize weevil and larger grain borer in the facilities at KARI - Katumani and KARI - Kiboko, both in Kenya.