• Corpus ID: 199564267

BIOLOGICAL ACTIVITIES OF CASSIA MIMOSOIDES ; EUCALYPTUS CAMALDULENSIS ; VEPRIS HETEROPHYLLA PLANT EXTRACT TOWARD OLD LARVAE AND ADULTS OF TRIBOLIUM CASTANEUM ( COLEOPTERA : TENEBRIONIDAE )

@inproceedings{Sali2017BIOLOGICALAO,
  title={BIOLOGICAL ACTIVITIES OF CASSIA MIMOSOIDES ; EUCALYPTUS CAMALDULENSIS ; VEPRIS HETEROPHYLLA PLANT EXTRACT TOWARD OLD LARVAE AND ADULTS OF TRIBOLIUM CASTANEUM ( COLEOPTERA : TENEBRIONIDAE )},
  author={Mohamadou Sali},
  year={2017}
}

• M. Sali
• Published 2017

In Cameroon and particularly in the Far North region, postharvest losses are a major problem for rural populations. To reduce losses due to storage pests, the use of biopesticides, remains the recommended method because it provides effective effect against pests without causing health problems to consumers and degrading the environment. This study aimed to evaluate the toxicity and repellent effect of Cassia mimosoides, Eucalyptus camaldulensis and Vepris heterophylla extracts on adults and oldest larvae of Tribolium castaneum (Coleoptera, Tenebrionidae). Contact toxicity and repulsion percentages were recorded at different doses (0.125; 0.25; 0.5 and 0.75 g/ml). At the end of the toxicity test, death rates increase with dose, the duration of exposure and the plant used both in adults than in larvae. A significant difference between treatments applied (P˂0.05) were noted. Thus the extracts of Cassia mimosoides and Eucalyptus camaldulensis give a total mortality (100 ± 0%) in adult for the concentration 0.75g/ml 72 hours after exposure, 97.5 ± 5% of mortality were obtained with Vepris heterophylla extract. In addition to the concentration of 0.125g/ml after 72 hours of exposure, the adult mortality is below 40 % for the three plants extract used. The mortality for larvae at the same concentration and the same exposure period were respectively 50 ± 4.08%; 43.75 ± 4.79 % and 42.5 ± 9.57% for the three plants. So the toxicity reaction of these extracts is faster for larvae and adults. The repellent effects of the three plants extracts used towards adults and the oldest larvae of Tribolium castaneum have a repulsive class IV order (repulsive) with an average of repulsion between 60 and 80%. These results show that the extracts of the three plants possess repellent compounds. This percentage of repulsion increases with the concentration used. Thus plants extract of the different can be use as a novel safe mehod to protect the grains from the damages caused by T. Castaneum.