[ Effets des biopesticides à base de la poudre d’amande du neem et des fruits du piment sur les insectes ravageurs du niébé (Vigna unguiculata (L.) Walp) ]
Volume 45, Issue 1, March 2025, Pages 197–205
Hayyo Halilou1, Aboubacar Kadri2, Hame Abdou Kadi Kadi3, and Hadja Amgare Aboubacar4
1 Département Protection des végétaux, Laboratoire de phytopathologie, Centre Régional de Recherche Agronomique de Maradi (CERRA, Maradi), Institut National de Recherche Agronomique du (INRAN), Nig, Niger
2 Département Productions Végétales, Faculté d’Agronomie, Université Abdou Moumouni de Niamey, BP: 10960 Niamey, Niger
3 Centre Régional de Recherche Agronomique (CERRA) de Niamey, Institut National de Recherche Agronomique du Niger (INRAN), BP: 429 Niamey, Niger
4 Département d’Agriculture en Zone Aride, Institut Universitaire de Technologie, Université d’Agadez, BP: 199 Agadez, Niger
Original language: French
Copyright © 2025 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.
In Niger, cowpea (Vigna unguiculata L. Walp.) ranks first among legumes produced and consumed and third among crops after pearl millet and sorghum. However, its production is compromised by numerous diseases and insect pests. The use of synthetic pesticides is the first control method used by producers against insect pest. The objective of this study is to evaluate the effects of biopesticides based on neem almond powder (T3) and ripe chili pepper fruits (T2) on cowpea insect pests in order to lower the costs associated with phytosanitary treatments and increase the yield of this crop. A total of five (5) applications were made at regular intervals of one week. Before each application, scouting was conducted to capture the count the insects in order to determine the incidence of these insects on the cowpea. The incidence of insect pests was 75.81% and 87.52% at the 3rd and 5th counts for the control (T1). On the other hand, it was 42.38% and 19.73% for the T2 treatment and 27.07% and 12.33% for the T3 treatment respectively at the 3rd and 5th counts. Similarly, the seed yield was increased after application of biopesticides. It was 387.67 kg/ha and 832.67 kg/ha respectively for T2 and T3 against 341.67 kg/ha for the control. During the present study, the biopesticide based on neem almond powder was more efficace than that based on ripe chilli pepper fruits.
Author Keywords: Cowpea, insect pests, biopesticides, neem, pepper, Niger.
Volume 45, Issue 1, March 2025, Pages 197–205
Hayyo Halilou1, Aboubacar Kadri2, Hame Abdou Kadi Kadi3, and Hadja Amgare Aboubacar4
1 Département Protection des végétaux, Laboratoire de phytopathologie, Centre Régional de Recherche Agronomique de Maradi (CERRA, Maradi), Institut National de Recherche Agronomique du (INRAN), Nig, Niger
2 Département Productions Végétales, Faculté d’Agronomie, Université Abdou Moumouni de Niamey, BP: 10960 Niamey, Niger
3 Centre Régional de Recherche Agronomique (CERRA) de Niamey, Institut National de Recherche Agronomique du Niger (INRAN), BP: 429 Niamey, Niger
4 Département d’Agriculture en Zone Aride, Institut Universitaire de Technologie, Université d’Agadez, BP: 199 Agadez, Niger
Original language: French
Copyright © 2025 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
In Niger, cowpea (Vigna unguiculata L. Walp.) ranks first among legumes produced and consumed and third among crops after pearl millet and sorghum. However, its production is compromised by numerous diseases and insect pests. The use of synthetic pesticides is the first control method used by producers against insect pest. The objective of this study is to evaluate the effects of biopesticides based on neem almond powder (T3) and ripe chili pepper fruits (T2) on cowpea insect pests in order to lower the costs associated with phytosanitary treatments and increase the yield of this crop. A total of five (5) applications were made at regular intervals of one week. Before each application, scouting was conducted to capture the count the insects in order to determine the incidence of these insects on the cowpea. The incidence of insect pests was 75.81% and 87.52% at the 3rd and 5th counts for the control (T1). On the other hand, it was 42.38% and 19.73% for the T2 treatment and 27.07% and 12.33% for the T3 treatment respectively at the 3rd and 5th counts. Similarly, the seed yield was increased after application of biopesticides. It was 387.67 kg/ha and 832.67 kg/ha respectively for T2 and T3 against 341.67 kg/ha for the control. During the present study, the biopesticide based on neem almond powder was more efficace than that based on ripe chilli pepper fruits.
Author Keywords: Cowpea, insect pests, biopesticides, neem, pepper, Niger.
Abstract: (french)
Au Niger, le niébé (Vigna unguiculata L. Walp.) occupe la première place de toute les légumineuses produites et consommées et la troisième place des cultures après le mil et le sorgho. Cependant, sa production est compromise par des nombreuses maladies et insectes ravageurs. L’application des pesticides de synthèse est la première méthode de lutte contre les insectes ravageurs qui est adaptée par les producteurs. L’objectif de cette étude est l’évaluation des effets des biopesticides à base de la poudre d’amande du neem (T3) et des fruits murs du piment (T2) sur les insectes ravageurs du niébé en vue de réduire les coûts liés aux traitements phytosanitaires et d’augmenter le rendement de cette culture. Au total cinq (5) applications sont effectuées à des intervalles réguliers d’une semaine. Avant chaque application, un comptage des plants attaqués par les insectes est effectué en vue de déterminer l’incidence de ces insectes sur le niébé. L’incidence des insectes ravageurs était de 75,81% et 87,52% au 3ème et 5ème comptage pour le témoin (T1). Par contre, elle était de 42,38% et 19,73% pour le traitement T2 et, 27,07% et 12,33% pour le traitement T3 respectivement au 3ème et 5ème comptage. De même le rendement graines s’est vu rehausser après application des biopesticides. Il était de 387,67 Kg/ha et 832,67 Kg/ha respectivement pour T2 et T3 contre 341,67 Kg/ha pour le témoin. Au cours de la présente étude, le biopesticide à base de la poudre d’amande du neem a été plus efficace que celui à base des fruits murs du piment.
Author Keywords: Niébé, insectes ravageurs, biopesticides, neem, piment, Niger.
How to Cite this Article
Hayyo Halilou, Aboubacar Kadri, Hame Abdou Kadi Kadi, and Hadja Amgare Aboubacar, “Effects of biopesticides based on neem almond powder and ripe chili fruits on cowpea insect pests (Vigna unguiculata (L.) Walp),” International Journal of Innovation and Applied Studies, vol. 45, no. 1, pp. 197–205, March 2025.
