Toxicity of Malaysian Medicinal Plant Extracts Against Sitophilus oryzae and Rhyzopertha dominica
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Published:2022-11-04
Issue:4
Volume:45
Page:1137-1160
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ISSN:2231-8542
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Container-title:Pertanika Journal of Tropical Agricultural Science
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language:en
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Short-container-title:JTAS
Author:
Hematpoor Arshia,Liew Sook Yee,Omar Hasmahzaiti,Shilpi Jamil Ahmad,Zahari Azeana,Syamsir Devi Rosmy,Mohd Salleh Haslinda,Tohar Norsita,Pei Theng Kim Rosalind,Qureshi Ahmad Kaleem,Nasrullah Ayu Afiqah,Chan Gomathi,Tiong Soon Huat,Ahmed Hamdi Omer Abdalla,Othman Muhammad Remy,Leong Sow Tein,Awang Khalijah,Mawi Masdah,Asib Norhayu
Abstract
The insecticidal activities of extracts from 22 Malaysian medicinal plant extracts from 8 botanical families were tested against rice weevil: Sitophilus oryzae (L.) and lesser grain borer: Rhyzopertha dominica (F.). The extracts were obtained using hexane, methanol, and dichloromethane to extract potential biopesticides from dried leaves. The toxicity levels were examined periodically based on antifeedant activity and contact toxicity assays using treated grain assay. Hexane extracts of Alpinia conchigera, Alpinia scabra, Curcuma mangga, Curcuma purpurascens, Goniothalamus tapisoides, Piper sarmentosum, and methanol extracts of Curcuma aeruginosa, C. mangga, and Mitragyna speciosa were the most potent extracts against S. oryzae and R. dominica with lethal concentration (LC50) values of ≤ 0.42 mg/mL and ≤ 0.49 mg/mL, respectively. The contact toxicity test results showed that methanol extracts of C. aeruginosa and C. mangga, dichloromethane extracts of Cryptocarya nigra, and hexane extracts of C. mangga, and C. purpurascens resulted in 100% mortality of both pests within 28 days exposure of 5 mg/cm2 concentration.
Publisher
Universiti Putra Malaysia
Subject
Plant Science,Forestry
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