The excessive use of chemical pesticides causes collateral damage to the environment with unimaginable consequences. In search of an alternative solution based on a biopesticide of plant origin (Azadirachta indica A Juss) and its insecticidal action, a trial was conducted against Sitophilus zeamais Motsch at the Laboratory of Food Chemistry at the National Pedagogical University. The aim was to determine the effectiveness of the natural bio-insecticidal effect of A. indica. By comparing the bio-insecticidal activities at various levels of powder formulation: 15, 25, 35 g in the protection of shelled maize. And the completely randomised setup was used in maize (Zea mays L.) storage.
The bio-insecticidal activity was efficient with 15, 25 and 35 g of neem powder formulation proved to be more insecticidal with 13 and 14 dead insects against 0 dead insects for the control after 42 days of storage. It was observed that time, temperature and humidity play an important role in post-harvest storage.