Journal of Entomology

Volume 18 (2), 47-54, 2021


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Diversity of Mealybugs Vectors of Cacao Swollen Shoot in Nawa Region (Southwest, Cote d’Ivoire)

N’guettia Akoua Miezan Claudine, Oro Zokou Franck and Ouali N’goran San-Whouly Mauricette

Background and Objective: The Swollen shoot virus is transmitted by several species of mealybugs. The objective of this work was to assess the status of mealybugs vectors of the Swollen shoot disease and specifically to determine the diversity of these mealybugs in the southwest of Cote d'Ivoire. Materials and Methods: The inventory was conducted at three sites Nawa area. The surveys were conducted on fixed plots of one hectare (1 ha) subdivided into 5 blocks (20×20 m). Each block consisted of 26 Cacao trees on which observations were made. Sampling consisted of checking in each block the presence or absence of mealybugs on the different organs of the Cacao tree at a height of 2 m. The mealybugs collected were brought to the laboratory for identification. Results: Eleven (11) species of mealybugs belonging to the family Pseudococcidae were inventoried. Among the eleven (11) species identified, Pseudococcus viburni and Pseudococcus sp. were the two species not yet recognized as Swollen shoot vectors in our study area. Formicococcus njalensis, the dominant species at the three sites, represented about 80% of the mealybugs population followed by Planococcus citri species (about 15%). The other species were in the minority with scale abundance ranging from 0-1%. Shannon's diversity index values varied by site H' = 0.22 for the Kipiri site, H' = 0.55 for the Petit Bondoukou site and H' = 0.77 for the Koda site. Conclusion: The study revealed several species of mealybugs of which Formicococcus njalensis and Planococcus citri were the most dominant.

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How to cite this article:

N’guettia Akoua Miezan Claudine, Oro Zokou Franck and Ouali N’goran San-Whouly Mauricette, 2021. Diversity of Mealybugs Vectors of Cacao Swollen Shoot in Nawa Region (Southwest, Cote d’Ivoire). Journal of Entomology, 18: 47-54.


DOI: 10.3923/je.2021.47.54
URL: https://ansinet.com/abstract.php?doi=je.2021.47.54

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