Research trials were conducted in three regions of Tanzania (Shinyanga, Dodoma, Manyara) and in three districts of Zimbabwe (Buhera, Binga and Harare), to test and compare the efficacy of a number of different grain protectants (including African DEs) at protecting grain from insect damage during storage under different agro-ecological zones. These comparative tests were run for two consecutive 10-month storage seasons during 2002-2004, and a third season is underway. The treated commodities include maize, sorghum, beans and cowpeas.
Riwa, W.; Mvumi, B.; Morris, M.; Stathers, T. Small-scale farmer utilisation of diatomaceous earths during storage. Project Final Report. (2005) 60 pp.