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International Journal of Innovation and Applied Studies
ISSN: 2028-9324     CODEN: IJIABO     OCLC Number: 828807274     ZDB-ID: 2703985-7
 
 
Monday 19 April 2021

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In Press: Insecticidal activity of formulations based on Moringa Oleifera seeds on Acanthoscelides Obtectus (Coléoptera: Bruchidae)


[ Evaluation de l’effet insecticide des formulations a base des graines de Moringa Oleifera sur Acanthoscelides Obtectus ]


                 

Kone Nsangou Abdou Nourou1, Heu Alain2, Mboussi Serge Bertrand3, Manga Essouma François4, Mvondo Nganti Dorothée5, Ndogho Pegalépo Angèle6, Ambela Mikeng Jean William7, Ndongo Bekolo8, and Ambang Zachée9

1 University of Dschang, Cameroon
2 University of Yaounde I, Cameroon
3 University of Douala, Cameroon
4 University of Yaounde I, Cameroon
5 University of Yaounde I, Cameroon
6 University of Yaounde I, Cameroon
7 University of Yaounde I, Cameroon
8 University of Yaounde I, Cameroon
9 University of Yaounde I, Cameroon

Original language: French

Received 27 March 2020

Copyright © 2021 ISSR Journals. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract


Stored seeds of Phaseolus vulgaris L. in are the target of several insects like Acanthoscelides obtectus Say. These pests can cause losses greater than 80 % after six to seven months of storage. The present study aimed to evaluate the insecticidal effects of Moringa oleifera seeds on adults of A. obtectus in storage through two compositions (ie powdery and oily). Four concentrations of oils (3.33; 6.66; 9.99 and 13.33 μl/g), four powder concentrations (4; 16.67; 33.33 and 50 %) and one negative control (C0 = 0 μL / mL) for each composition were used. The experiment was conducted in the laboratory, with four repetitions. The results of the oil contact toxicity test revealed 100 % mortality at doses of 300 and 400 μL after two days of exposure. As for Moringa powder, the insecticidal effect was less pronounced for all doses with a mortality rate of 55 % at day 5 for doses 10 and 15 g. The inhibition of eggs laid and their viability is a function of the concentration of Moringa oil. On the other hand, the powder had no effect on the number of eggs laid and rather stimulated the viability of the eggs. Moringa oil prevents weight loss of stored bean seeds with a null loss percentage at doses of 300 and 400 μL. As for the powder, it had no effect on the weight loss of bean seeds in storage. The powder and oil of Moringa seeds did not affect the germination capacity of the seeds for all the doses tested. Moringa seed oil can therefore be exploited in the integrated control of the pest of common bean seeds in storage.

Author Keywords: Acanthoscelides obtectus, Moringa oleifera, Phaseolus vulgaris, oils, powder, insecticidal effect.