Article (Scientific journals)
Lethal Toxicity of Thymus capitatus Essential Oil Against Planococcus citri (Hemiptera: Pseudococcidae) and its Coccinellid Predator Cryptolaemus montrouzieri (Coleoptera: Coccinellidae)
Alloui-Griza, Rafika; Cherif, Asma; Attia, Sabrine et al.
2022In Journal of Entomological Science, 57 (3), p. 425 - 435
Peer reviewed
 

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Keywords :
biocontrol agent; citrus mealybug; fumigant toxicity; natural extracts; Ecology, Evolution, Behavior and Systematics; Agronomy and Crop Science; Insect Science
Abstract :
[en] Botanical extracts, including essential oils, are promising alternatives to synthetic insecticides for pest control. In this study, we evaluated the fumigant toxicity of an essential oil extracted from Thymus capitatus (L.) Hoffmanns. & Link against the citrus mealybug, Planococcus citri Risso (Hemiptera: Pseudococcidae), and its coccinellid predator Cryptolaemus montrouzieri Mulsant (Coleoptera: Coccinellidae) under laboratory conditions. Gas chromatography-mass spectrometry analysis indicated that the major chemical compounds identified from T. capitatus were carvacrol (65.15%), followed by p-cymene (11.79%) and γterpinene (7.48%). High mortality levels were registered for P. citri larvae (up to 100%) and adults (up to 96%) when exposed to the tested essential oil. The median lethal concentration values calculated for P. citri adults were higher than for larvae. Thymus capitatus essential oil applied at 10 and 20 μL/Lair showed high toxicity towards C. montrouzieri adults. These results highlighted the efficacy of T. capitatus essential oil as a promising tool to control P. citri in Tunisia. However, the adverse effects of this oil towards C. montrouzieri should be taken into consideration to enhance its practical implication in integrated pest management.
Disciplines :
Entomology & pest control
Author, co-author :
Alloui-Griza, Rafika;  Department of Plant Health and Environment, Laboratory of Bioaggressors and Integrated Pest Management in Agriculture, University of Carthage, National Agronomic Institute of Tunisia, Tunis, Tunisia
Cherif, Asma ;  Université de Liège - ULiège > Agronomie, Bio-ingénierie et Chimie (AgroBioChem) > Gestion durable des bio-agresseurs ; Department of Plant Health and Environment, Laboratory of Bioaggressors and Integrated Pest Management in Agriculture, University of Carthage, National Agronomic Institute of Tunisia, Tunis, Tunisia
Attia, Sabrine;  Department of Plant Health and Environment, Laboratory of Bioaggressors and Integrated Pest Management in Agriculture, University of Carthage, National Agronomic Institute of Tunisia, Tunis, Tunisia
Francis, Frédéric  ;  Université de Liège - ULiège > TERRA Research Centre > Gestion durable des bio-agresseurs ; Department of Plant Health and Environment, Laboratory of Bioaggressors and Integrated Pest Management in Agriculture, University of Carthage, National Agronomic Institute of Tunisia, Tunis, Tunisia
Lognay, Georges ;  Université de Liège - ULiège > Département des sciences et gestion de l'environnement (Arlon Campus Environnement) > Surveillance de l'environnement ; Department of Plant Health and Environment, Laboratory of Bioaggressors and Integrated Pest Management in Agriculture, University of Carthage, National Agronomic Institute of Tunisia, Tunis, Tunisia
Grissa-Lebdi, Kaouthar;  Department of Plant Health and Environment, Laboratory of Bioaggressors and Integrated Pest Management in Agriculture, University of Carthage, National Agronomic Institute of Tunisia, Tunis, Tunisia
Language :
English
Title :
Lethal Toxicity of Thymus capitatus Essential Oil Against Planococcus citri (Hemiptera: Pseudococcidae) and its Coccinellid Predator Cryptolaemus montrouzieri (Coleoptera: Coccinellidae)
Publication date :
July 2022
Journal title :
Journal of Entomological Science
ISSN :
0749-8004
Publisher :
Georgia Entomological Society Inc.
Volume :
57
Issue :
3
Pages :
425 - 435
Peer reviewed :
Peer reviewed
Funding text :
This work was supported by the National Agronomic Institute of Tunisia. Rafika Alloui-Griza benefited from a doctoral fellowship as a part of Algerian–Tunisian cooperation from the Ministry of Higher Education and Scientific Research, Algeria.
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since 12 October 2023

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