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Changes in the Quality of Maize (zea mays l.) Post-Harvest Stored i Granaries with the Biopesticides from Rural Conditions in Côte d’Ivoire

NIAMKETCHI Léonce , CHATIGRE Olivier , COULIBALY Adama , KONAN Ysidor , BIEGO,Marius Henri G

The aim of this study was to determine the correlation between merchantable, nutritive and hygienic qualities of maize (Zea mays L.) cobs and grains stored in traditional and improved granaries using a combination of leaves derived from Lippia multiflora Moldenke and Hyptis suaveolens Poit. Benth. Thus nine parameters were studied and monitoring during 8 months of storage. Results showed that all the parameters were strongly linked and significantly (P<0.05) altered during the storage period of the study. The contents of water (0.83 to 0.91), moisture (9.14% to 12.78%), weight loss (0.02% to 34.32%), free fat acidity (2.00% to 5.88%), peroxide (2.10 meq O2/kg to 6.10 meq O2/kg), aflatoxin B1 (0.28 µg/kg to 58.10 µg/kg) and ochratoxin A (0.32 µg/kg to 41.53 µg/kg) increase whereas a decrease in starch content (65.10% to 53.5%) and iodine value (121.40 g I2/100 g to 94.82 g I2/100 g) were recorded. For each stage, composition of maize cobs and grains did not differ whether they are treated in traditional or improved granaries with both plant materials. The results also indicate that storage maize at 6 months with the combination of two local plants would be more suitable. Thus, the use of leaves derived of L. multiflora and H. suaveolens can slow down the degradation of maize in storage.