Crop losses due to outbreaks of Mastomys natalensis (Smith, 1834) Muridae, Rodentia, in the Lindi Region of Tanzania

In 1989, a widespread outbreak of the multimammate rat - Mastomys natalensis (Smith, 1834) occurred in the Lindi Region in southern Tanzania. Population densities of the rodent were estimated in some areas to be over 1400 rats ha(-1). Crop loss due to the outbreak was evaluated in the region. A total yield loss of 48% of maize, sorghum, paddy, and pulses that were in production during the 1989/90 crop season was attributed to seed depredation by the rats. The Tanzanian government spent about US$16, 000 on a rodent-control campaign in this region. Food losses due to rodents required the government to supply relief food to residents threatened by famine. (C) 2002 Published by Elsevier Science Ltd.