Volume 40, Issue 1, December 2018, Pages 20–31
Gustave BONNI1, Saturnin Azonkpin2, and Armand PARAÏSO3
1 Institut National des Recherches Agricoles du Bénin, 01BP 884 Cotonou, Benin
2 Institut de Recherche sur le Coton, Antenne Régionale Sud, Laboratoire d’Entomologie de Cana, BP: 143 BOHICON, Benin
3 Faculté d'Agronomie, Université de Parakou, BP 123, Parakou, Benin
Original language: French
Copyright © 2018 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.
The study on the efficacy of phytosanitary treatment programs based on neem extract or kaolin was undertaken in the center of Benin. The objective of the work was to identify a treatment program that is more effective than the outreach in the area. To achieve this goal, a Fisher block device with 6 treatments and 4 repetitions were set up on two sites. The treatments developed consisted of an untreated plot; of a treated plot to the program popularized (PP); of a plot treated exclusively in Kaolin 5%; of a plot receiving: 3 neem-2 emamectine/acetamipride-2 neem; of a plot receiving: 2 emamectine/acetamipride -2 neem-1 emamectine/acetamipride -2 neem and of a plot treated in the mixture of neem + emamectine/acetamipride on 7 applications. Ten applications were conducted with the kaolin used alone and 7 with the other objects. The results showed good control of endocarpiques larvae by programs N°4 and N°6, consisting respectively of 3neem-2 emamectine/acetamipride-2 neem and of 7 treatments in the neem mixture emamectine/acetamipride. The average number of larvae in the green bolls obtained on plots treated following these two programs has not been statistically different from that of the treated plots following the program popularized in the area. This average number of larvae was also reduced as compared to untreated parcels (p=0.0029). The program exclusive to the kaolin 5% has controlled the endocarpiques larvae, Pectinophora gossypiella and Thaumatotibia leucotreta as well as the popularized program. The number of plants attacked by pests of foliage, including Haritalodes derogata and Aphis gossypii has been reduced respectively by 34.7% and 47% against 95.6 and 82.4% on average by the other treatment programs. The program N°5, starting by two treatments to emamectine/acetamipride was in contrast less effective on the control of the endocarpiques larvae in the area. This study has shown that phytosanitary treatment program consisting of applications of neem extracts alternating or in mixture with an alternative product to pyrethroids can effectively control endocarpiques larvae on cotton, limiting resistance to insecticides and reduce The stress on environment due to chemicals.
Author Keywords: cotton, Pectinophora gossypiella, Thaumatotibia leucotreta, kaolin, neem extract.
Gustave BONNI1, Saturnin Azonkpin2, and Armand PARAÏSO3
1 Institut National des Recherches Agricoles du Bénin, 01BP 884 Cotonou, Benin
2 Institut de Recherche sur le Coton, Antenne Régionale Sud, Laboratoire d’Entomologie de Cana, BP: 143 BOHICON, Benin
3 Faculté d'Agronomie, Université de Parakou, BP 123, Parakou, Benin
Original language: French
Copyright © 2018 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
The study on the efficacy of phytosanitary treatment programs based on neem extract or kaolin was undertaken in the center of Benin. The objective of the work was to identify a treatment program that is more effective than the outreach in the area. To achieve this goal, a Fisher block device with 6 treatments and 4 repetitions were set up on two sites. The treatments developed consisted of an untreated plot; of a treated plot to the program popularized (PP); of a plot treated exclusively in Kaolin 5%; of a plot receiving: 3 neem-2 emamectine/acetamipride-2 neem; of a plot receiving: 2 emamectine/acetamipride -2 neem-1 emamectine/acetamipride -2 neem and of a plot treated in the mixture of neem + emamectine/acetamipride on 7 applications. Ten applications were conducted with the kaolin used alone and 7 with the other objects. The results showed good control of endocarpiques larvae by programs N°4 and N°6, consisting respectively of 3neem-2 emamectine/acetamipride-2 neem and of 7 treatments in the neem mixture emamectine/acetamipride. The average number of larvae in the green bolls obtained on plots treated following these two programs has not been statistically different from that of the treated plots following the program popularized in the area. This average number of larvae was also reduced as compared to untreated parcels (p=0.0029). The program exclusive to the kaolin 5% has controlled the endocarpiques larvae, Pectinophora gossypiella and Thaumatotibia leucotreta as well as the popularized program. The number of plants attacked by pests of foliage, including Haritalodes derogata and Aphis gossypii has been reduced respectively by 34.7% and 47% against 95.6 and 82.4% on average by the other treatment programs. The program N°5, starting by two treatments to emamectine/acetamipride was in contrast less effective on the control of the endocarpiques larvae in the area. This study has shown that phytosanitary treatment program consisting of applications of neem extracts alternating or in mixture with an alternative product to pyrethroids can effectively control endocarpiques larvae on cotton, limiting resistance to insecticides and reduce The stress on environment due to chemicals.
Author Keywords: cotton, Pectinophora gossypiella, Thaumatotibia leucotreta, kaolin, neem extract.
Abstract: (french)
Les travaux de recherche sur l’efficacité de programmes de traitement phytosanitaire à base d’extrait de neem et de produit de synthèse d’une part et de kaolin de l’autre dans la gestion des chenilles endocarpiques du cotonnier ont été conduits dans la zone Centre du Bénin. L’objectif visé par les travaux était d’identifier un programme de traitements phytosanitaires plus efficace que celui en vulgarisation dans la zone. Pour atteindre cet objectif, un dispositif en Bloc de Fisher avec 6 traitements et 4 répétitions a été mis sur pied sur deux sites. Les traitements mis en comparaison étaient constitués d’une parcelle non traitée ; d’une parcelle traitée au programme vulgarisé (PV); d’une parcelle traitée exclusivement au kaolin 5% ; d’une parcelle recevant: 3 neem-2 emamectine/acetamipride-2 neem ; d’une parcelle recevant : 2 emamectine/acetamipride -2 neem-1 emamectine/acetamipride -2 neem et d’une parcelle traitée au mélange neem+ emamectine/acetamipride sur les 7 applications. Le traitement au kaolin 5% a été réalisé avec un pulvérisateur à dos, à pression entretenue. Dix applications ont été réalisées au kaolin utilisé seul et 7 applications sur les autres objets. Les résultats ont montré le bon contrôle des chenilles endocarpiques par les programmes N°4 et N°6, constitués respectivement de 3neem-2 emamectine/acetamipride-2 neem et de 7 traitements au mélange neem+emamectine/acetamipride. Le nombre moyen de chenilles dans les capsules vertes obtenues sur les parcelles traitées suivant ces deux programmes n’a pas été différent statistiquement de celui des parcelles traitées suivant le Programme de traitement vulgarisé (PV) dans la zone. Ce nombre moyen de chenilles a été également réduit par rapport à celui des parcelles non traitées (p=0,0029). Le programme exclusif au kaolin 5% a contrôlé aussi bien les chenilles endocarpiques, Pectinophora gossypiella et Thaumatotibia leucotreta que le PV. Le nombre de plants attaqués par les ravageurs de feuillage, notamment Haritalodes derogata et Aphis. gossypii a été réduit respectivement de 34,7 % et de 47% contre 95,6 et 82,4% en moyenne par les autres programmes de traitement. Le programme N°5, débutant par deux traitements à emamectine/acetamipride a été par contre faible pour le contrôle des chenilles endocarpiques dans la zone. Cette étude a montré que le programme de traitement phytosanitaire constitué des applications d’extraits de neem en alternance avec un produit alternatif aux pyréthrinoïdes ou en mélange peut contrôler efficacement les chenilles endocarpiques du cotonnier, ce qui pourrait limiter les cas de résistances aux insecticides et réduire le stress sur l’environnement créé par les produits chimiques.
Author Keywords: Cotonnier, Pectinophora gossypiella, Thaumatotibia leucotreta, kaolin, extrait de neem.
How to Cite this Article
Gustave BONNI, Saturnin Azonkpin, and Armand PARAÏSO, “Efficacité des programmes de traitement phytosanitaire à base de kaolin, de neem et d’insecticide dans la gestion des chenilles endocarpiques du cotonnier dans la zone Centre du Bénin,” International Journal of Innovation and Scientific Research, vol. 40, no. 1, pp. 20–31, December 2018.
