ABSTRACT
This work proved the presence of three Genera viz.; R. rattus (Linn.) followed by R. norvegicus Berk., A. niloticus (Desm.) and Mus musculus Linn., belonging to two genera (Rattus and Mus) from family Muridae, were recorded in kerdasa and Osim distracts at Giza governorate. Thronghant two successive years 2015 and 2016 A.D. The damage caused by rats in wheat fields during the whole repin stages; (milky, pasty , dough and mature stages). The obtained results cleared that rate of damage increased during the pasty stage then decreased during the mature stage. The rodent damage percentage for 2015 and 2016 were (9.14%, 6.78%) and (12.81% and 6.07%) in kerdasa and Osim distracts respectively. Whereas, the rodents damage estimation in their crop fields was conducted during the full size pod, full size seed and mature stages. The calculated rodent damage percentage in maize crop fields were, (1.49% and 1.45%) and (2.59% and 0.92 % ) in kerdasa and Osim distracts respectively. Maize was exposed to high rodent infestation during the full size seed stage more than the previous or later stages. The damage of rodents to field crops may be depends upon the growth stage.