Seasonal fluctuations of sail and root surface fungi of sugarcane [saccharum officinarum l.] in upper egypt

The seasonal fluctuations of non-rhizosphere and rhizosphere soils and rhizoplane fungi of sugar cane were studied using glucose-, cellulose- and 50% sucrose-Czapek's agar media at 28C. The total counts of fungi in these substrates fluctuated irregularly. Seventy-three species and five varieties representing 33 genera were collected. The most frequently encountered species were Alternaria alternata, Aspergillus flavus, A. Niger, Cochliobolus spicifer, Gibberella fujikuroi and Penicillium chrysogenum in the non- rhizosphere soil; Aspergillus flavus, A. Niger, Nectria hematococca and Penicillium chrysogenum in the rhizosphere soil and Aspergillus flavus, A. Niger, Cochliobolus spicifer, Fusarium oxysporum, Gibberella fujikuroi, Nectria hematococca and Penicillium chrysogenum in rhizoplane. The monthly counts of these fungi fluctuated irregularly giving peaks during the different months

Effects of garlic extract and some organic compounds on feedstuffs fungi in Qena, Egypt

The activity of garlic extract, propionic aid, sodium benzoate and aflagin against the fungi contaminating cow and poultry feedstuffs was studied using glucoseczapeks's agar. It was found that both garlic extract and propionic acid caused a direct complete growth inhibition of all tested fungi at the levels of 0.5% g per 100 ml medium [0.5 w/v] and 0.15% [w.v]. The counts of total and individual fungals species were almost significant lowered when sodium benzoate or aflagin were incorporated in the agar medium at the levels of 2.0% [w/v] and 0.4% [w/v], respectively

Assessment of microbiological quality of underground water of upper Egypt, Qena region

Over a period of two years [1989-1991], a total of 32 samples were collected every three months from underground water using handly pumps, the deep well hand pumps and the small scale water system [SSS] in Qena area. The water was analyzed for the following bacteriological parameters; TC [Total Coliform], FC [Faecal Coliform], MPN [most probable number], TNTC [too numerous to count] and Colphages. Also, mold and yeast were counted, isolated and identified from same samples. Aspergillus contributed the broadest spectra of species and was represented by 7 groups. The average total counts "244", Penicillium two species total counted "12", other genera were Rhizopus stolonifer, Fusarium solani and Trichoderma harzianum. Yeast occurred in water samples were Candida utilis, Candida albicans, Candida solani, Torulopsis famata, T. ernobii, T. candida, Cryptococcus albidus, Cryptococcus neaformcans, Rhodotorula rubra and Rhodotorula flava. In addition, physicochemical analysis including temperature, pH, OD [Oxygen dissolved] total salinity and electrical conductivities were also made

Lipase productivity by a lipolytic strain of aspergillus sydowi isolated from Egyptian Soil

An attempt was made to evaluate the lipase productivity by a lipolytic strain of Aspergillus sydowii, isolated from Egyptian soil, in response to varying pH, temperature, incubation periods and liquid substrates. Results have shown that the optimum pH was 5.6, the optimum temperature was 28C, the optimum incubation period was five days and the best lipid substrate was corn oil giving optimum values of lipase at the concentration of 0.3% v/v