Ogunleye et al. / J Zhejiang Univ Sci B 2007 8(12)Abstract: Insecticidal effects of different doses of the dust and methanol extracts of Garcinia kolae on Callosobruchus maculatus and Sitophilus zeamais were tested. The dust had no significant effect on the two insects; none of them died even at 3 d after treatment. The methanol extracts, however, had rapid lethal effects on both C. maculatus and S. zeamais. The mortality of C. maculatus by the lowest concentration of methanol extracts ranged from 95%~100% whereas in S. zeamais, the mortality ranged from 87.5%~100% and 70%~100% in concentrations of 1 g extract+3 ml methanol and 1 g extract+5 ml methanol, respectively, from 24 to 48 h. The least concentration of 1 g extract+15 ml methanol had no significant lethal effect on Sitophilus zeamais.

The levels of fatty acids, phospholipids and sterols were determined in the samples of Basella alba and Basella rubra commonly consumed in the South-Western Nigeria by gas chromatography. Results showed that the crude fat levels were 4.40 and 4.41 % in the Basella alba and Basella rubra samples respectively. The fatty acid composition of Basella alba and Basella rubra samples shows that the SFA was 26.0 and 24.9 %, MUFA was 1.19 and 1.24 % and PUFA was 72.5 and 73.8% respectively. The other quality parameters of Basella alba and Basella rubra were found: PUFA/SFA, 2.79 and 2.97; MUFA/SFA, 0.046 and 0.050; n-6/n-3, 2.47 and 3.31; LA/ALA, 0.890 and 1.12 and EPSI (PUFA/MUFA), 60.8 and 59.5 respectively. Phospholipids present in Basella alba and Basella rubra were 1679 and 1920 mg/100g respectively. In the group of phytosterols, sitosterol was highest with values of 196 mg/100g and 275 mg/100g in Basella alba and Basella rubra samples respectively. Linear correlation at α = 0.05, df: n-1 showed that significant difference exists between the fatty acid, quality parameters of the fatty acids phospholipids and sterols.