Journal of Pure and Applied MicrobiologyVol. 6 No. 1

Mycoflora Associated with Stored Wild Castor (Ricinus communis L.) Seeds in Kogi State of Nigeria

A. Negedu¹, J.B. Ameh², V.J. Umoh² and S.E. Atawodi³

¹Raw Materials Research and Development Council, P.M.B. 232, Garki, Abuja, Nigeria. ²Department of Microbiology, ³Department of Biochemistryy, Ahmadu Bello University, Zaria, Nigeria.

Received on 12 July 2011 and accepted on 21 April 2011

 

ABSTRACT

Stored castor (Ricinus communis L. ) seeds collected from four different parts of Kogi State, Nigeria were screened for associated mycoflora. Using the direct plating method, samples were plated out on Sabouroud Dextrose Agar (SDA) as growth medium and incubated at room temperature (27 ±1°C) for 7– 12 days. The resulting growth was visually and microscopically screened for fungal species. Results showed that the temperature of the stores ranged from 20-28°C, while the moisture content values of the seeds ranged from 5 – 8%. Aspergillus spp were the commonest fungi (66.67%) found in the stored seeds, while species belonging to the Cephalioplora, Penicillium and Syncephalastrum genera were less common with 11.11% occurrence each. There was significant difference in the percentage occurrence of Aspergillus flavus between the various locations. These results are important in developing standard for post harvest practices aimed at discouraging fungal contamination of castor seeds.

Keywords : Castor seeds, Mycoflora., Aspergillums flavus, Cephalioplora, Penicillium, Syncephalastrum, Fungal contamination.