Antifungal Activity Of Some Selected Fumigants Regularly Used Against Fungi Isolated From Repository Of Dar- Al-Kottob Of Egypt

The main goal of this work was to investigate the prevalence of fungi inside a repository of Dar al-Kutub during November 2017 and the biological fungicidal and fungistatic activities of some fumigants against isolated fungi. Indoor airborne fungi ranged from 10.482 to 83.857 cfu X10(2). Which were seven species belonged to five genera of filamentous fungi were detected and identified. The percentage abundance of the species Aspergillus flavus (27.11%), Aspergillus niger (22.03%) and Penicillium chrysogenum (23.73%) were present in high values. On the hand, the other fungal genera could be arranged in descending order as follows: Fusarium spp. (7.63%), Trichoderma spp. (4.24%) and Alternaria spp. (3.39%). The antifungal effectiveness of three selected fumigants (phostoxin, dettol+isopropanol and paraformaldehyde) was determined. Complete reduction (100%) in the linear growth by phostoxin of all tested fungi, whereas a high growth reduction was also observed by paraformaldehyde. A potent effect was observed by dettol+isopropanol which can be arranged on descending order as follows: Penicillium chrysogenum (96.30%), Trichoderma harzianum (73.00%), A. niger (69.93%), and then F. oxysporum (55.97%). The most effective concentration was 20%, whereas the lowest levels of inhibition was observed against T. harzianum (18.87%), followed by F. oxysporum (30.30%) at conc. 5%. Dettol and isopropanol formulation as well as para-formaldehyde had a significant fungicidal activity on the growth of all tested fungi). As no growth was appeared (100% inhibition) from the fungal disc taken from plates of both fumigants against F. oxysporum, T. harzianum and P. chrysogenum. But, phostoxin showed fungistatic activity as different levels of inhibition ranged from 6.66 - 73.33% were observed from discs of all fungi.