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Veeravat Changkeb. Insecticidal efficacy and possibility of combretum trifoliatum vent. (Myrtales: Combretaceae) extracts in controlling spodoptera frugiperda (J.E. Smith) (Lepidoptera: Noctuidae). Master's Degree(Biology). Kasetsart University. Office of the University Library. : Kasetsart University, 2023.
Insecticidal efficacy and possibility of combretum trifoliatum vent. (Myrtales: Combretaceae) extracts in controlling spodoptera frugiperda (J.E. Smith) (Lepidoptera: Noctuidae)
Name: Veeravat Changkeb
Classification :.LCCS: QL561.N7
LCSH:
Fall armyworm
LCSH:
Noctuidae
LCSH:
Plant extracts
LCSH:
Insecticides
LCSH:
Combretaceae
Abstract:
The fall armyworm (Spodoptera frugiperda) is an important pest of agronomical crops. It is interesting to discover secondary metabolites in plants, as they may represent pest control solutions, that are environmentally safer than synthetic pesticides. For this purpose, Combretum trifoliatum crude extract and its isolated compounds were investigated for their insecticidal activities against S. frugiperda. The median lethal dose (LD50) was evaluated in the second-instar larvae using the topical application method. The isolated compounds, apigenin and camphor demonstrated a highly toxic effect on larvae at a lower LD50 dose than crude extract. Moreover, when the larvae were exposed to crude extract concentrations of 2.5, 5, 10, and 20 µg/larva, the development to pupa and adult stages was reduced by more than 50%. The ovicidal toxicity was examined using a hand sprayer. The extract concentration 5, 10, and 20 µg/egg significantly decreased the egg hatchability. In addition, crude extract showed a significant difference in inhibiting acetylcholinesterase (AChE) activity while crude extract and camphor showed significant inhibitory effects on carboxylesterases (CE) and glutathione S-transferase (GST) activities. The crude ethanol extract of C. trifoliatum leaves and twigs was toxic to S. frugiperda in terms of larval mortality, negatively affecting biological parameters, and decreasing egg hatchability. Additionally, the activities of cholinergic and detoxifying enzymes were affected by crude extract and its isolated compounds. These results highlight that C. trifoliatum might be efficient as a bioinsecticide to control S. frugiperda.
Kasetsart University. Office of the University Library
Address:
Bangkok
Email:
tdckulib@ku.ac.th
Name: Vasakorn Bullangpoti
Role:
Thesis Advisor
Name: Saksit Nobsathian
Role:
Thesis CO-Advisor
Created:
2023
Modified:
2025-07-24
Issued:
2025-07-24
วิทยานิพนธ์/Thesis
application/pdf
URL: https://www.lib.ku.ac.th/KUthesis/2566/veeravat-cha-all.pdf
CallNumber:
QL561.N7 .V43
eng
DegreeName: Master of Science
Level: Master's Degree
Descipline: Biology
Grantor: Kasetsart University
©copyrights Kasetsart University
RightsAccess:
ใช้เวลา
0.038049 วินาที
Veeravat Changkeb
| Title | Contributor | Type |
|---|---|---|
| Insecticidal efficacy and possibility of combretum trifoliatum vent. (Myrtales: Combretaceae) extracts in controlling spodoptera frugiperda (J.E. Smith) (Lepidoptera: Noctuidae)
มหาวิทยาลัยเกษตรศาสตร์ Veeravat Changkeb | Vasakorn Bullangpoti | วิทยานิพนธ์/Thesis |
Vasakorn Bullangpoti
Saksit Nobsathian
| Title | Creator | Type and Date Create |
|---|