ABSTRACT
The effect of different fungi species, [Aspergillus Carcincus, Verticillium sp., Helminthosporium turicum, Diplodia sp. and Alternaria tenuis] on the biology of Tyrophagus putrescentiae was measured under the laboratory conditions 27 +/- 2°c with 65 +/- 5%RH. All different stages affected by the used fungi. The shortest period of immature stages occurred under feeding on fungi Aspergillus carcinicus by females and males. Feeding on Alternaria tenuis by females and males prolonged the period of immature stages. It also prolonged the female and male life span [36.3days and 31.7 days respectively] in comparison with the other used fungi. The number of deposited eggs by the adult female also affected by feeding on different fungi species. Concerning the adult longevity, it was significantly differed when mites fed on the different tested fungi .Generally female longevity was longer than male when feeding on any of the used fungi. The maximum longevity of Tyrophagus putrescentiae was observed when rearing on Alternaria tenuis