Chemical profiling and bioactivities of essential oils from Thymus capitatus and Origanum compactum against Tribolium castaneum
Houssam Annaz,
Hassan Annaz,
Ayoub Ajaha,
Noureddin Bouayad,
Karim El Fakhouri,
Amin Laglaoui,
Mustapha El Bouhssini,
Mansour Sobeh,
Kacem Rharrabe
Affiliations
Houssam Annaz
Research Team Agricultural and Aquacultural Engineering, FPL, Abdelmalek Essaadi University, Tetouan, Morocco; Research Team Biotechnology and Biomolecules Engineering, FSTT, Abdelmalek Essaadi University, Tetouan, Morocco; Corresponding author. Research team Agricultural and Aquacultural Engineering, FPL, Abdelmalek Essaadi University, Tetouan, Morocco.
Hassan Annaz
AgroBioSciences Program, College of Agriculture and Environmental Sciences, University Mohammed VI Polytechnic, Ben Guerir, Morocco
Ayoub Ajaha
Research Team Agricultural and Aquacultural Engineering, FPL, Abdelmalek Essaadi University, Tetouan, Morocco
Noureddin Bouayad
Research Team Biotechnology and Biomolecules Engineering, FSTT, Abdelmalek Essaadi University, Tetouan, Morocco
Karim El Fakhouri
AgroBioSciences Program, College of Agriculture and Environmental Sciences, University Mohammed VI Polytechnic, Ben Guerir, Morocco
Amin Laglaoui
Research Team Biotechnology and Biomolecules Engineering, FSTT, Abdelmalek Essaadi University, Tetouan, Morocco
Mustapha El Bouhssini
AgroBioSciences Program, College of Agriculture and Environmental Sciences, University Mohammed VI Polytechnic, Ben Guerir, Morocco
Mansour Sobeh
AgroBioSciences Program, College of Agriculture and Environmental Sciences, University Mohammed VI Polytechnic, Ben Guerir, Morocco
Kacem Rharrabe
Research Team Agricultural and Aquacultural Engineering, FPL, Abdelmalek Essaadi University, Tetouan, Morocco; Research Laboratory Biology, Environment and Sustainable Development, ENS, Abdelmalek Essaadi University, Tetouan, Morocco
The use of essential oils has emerged as an ecofriendly solution for controlling different pests, particularly insects of stored products. Essential oils (EOs) from Thymus capitatus (TC) and Origanum compactum (OC) have received less attention for these bioactivities. Therefore, our study aimed to assess the repellent, antifeedant and contact toxicity of their EOs against a major stored product pest Tribolium castaneum. Besides, GC-MS was also carried out to determine the compounds responsible for the observed bioactivities. Regarding contact toxicity, LC50 values were 0.58 and 0.35 μL/cm2 for TC and OC after 24 h of exposure, respectively. For the repellent effect, the percentage of repellency (PR) was variable across different concentrations and exposure durations. TC exhibited the best PR (98%) after 3 h of exposure at 0.031 μL/cm2. For prolonged repulsive effect (24 h), TC sustained its repulsive efficacy with a PR of 90% at 0.062 μL/cm2 followed by OC with a PR of 88% at 0.125 μL/cm2. As for the antifeedant effect, both EOs had a significant impact on nutritional indexes, especially the feeding deterrent index and relative consumption rate. OC displayed a notable effect, causing 59% of feeding deterrence at 1.92 μL/pellet. These multifaced effects can be explained by the high content of carvacrol in both EOs (OC: 90% and TC: 78%). These multifaced effects demonstrated through different exposure routes and bioassays promote the use of T. capitatus and O. compactum EOs as a sustainable management strategy to control T. castaneum.
