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.
Our present study was conducted precisely to determine the effects of long-term incineration on banana and plantain cultivation under the conditions of Masako in particular and the Kisangani region in general whose cultivars Litete, Libanga, Gros Michel and Yangambi Km5 were used as propagating material. Observation included the inventory in the system, average plant height, average diameter, number of functional leaves, number of rejets, rate of infection of cercosporiasis and fusarium wilt, and infestation rate of infection of cercosporiasis and fusarium wilt, and infestation rate of weevils and nematodes. The results of these various parameters showed in particular that the inincinerated block gave a superior result compared to the incinerated block.
It is important to remember that comparing the averages of plants in the same block shows significant differences at the 5 % threshold between cultivars.
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