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This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License
Article
Author(s)
Hala Kinampinan Adelphe1, 3, Aby N’goran2, Hala N’klo3, Akpesse Akpa Alexandre Moïse1 and Koua Kouakou Hervé1
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DOI:10.17265/1934-7391/2018.04.002
Affiliation(s)
1. Laboratory of Zoology and Animal Biology, Félix Houphouët-Boigny University, 22 BP 582 Abidjan 22, Côte d’Ivoire
2. National Centre of Agronomic Research (CNRA), Research Station of Bimbresso, 01 BP 1536 Abidjan 01, Côte d’Ivoire
3. National Centre of Agronomic Research (CNRA), Research Station of La Mé, 13 BP 989 Abidjan 13, Côte d’Ivoire
ABSTRACT
Prosoestus sculptilis and Prosoestus minor (Coleoptera, Curculionidae) are female inflorescences of the oil palm pest.
These insects can cause a considerable decrease (about
40%) of the setting rate. The currently proposed control method is the chemical
control with the use of thiocyclam-hydrogen-oxalate, derived from the Nereistoxin.
For sustainable agriculture, it is appropriate to use an integrated pest management
system, including biological control. The purpose of this work is to contribute
to the biological control of Prosoestus spp.
by the use of Metarhizium anisopliae,
entomopathogenic fungus, to improve fruit set rate of oil palm. A screening of five
(05) isolates of the fungus was performed by passive and active suspensions inoculation
of spores in increasing concentrations. Coded isolates CNRA-BME2 and CNRA-BME5 were most virulent for these insects
with mortality rates of approximately 80% during the passive inoculation on fungic
cultures. The concentration c = 109 spores/mL was optimal during active inoculation. Metarhizium anisopliae is therefore a potential biological control agent
against Prosoestus.
KEYWORDS
Biological control, Prosoestus spp., oil palm tree, fruit set rate.
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