Insect deterrent activity of ethanolic leaf extracts of landrace maize and determination of active compounds against Spodoptera littoralis Boisduval (Lepidoptera: Noctuidae)

Santos, L. F. C. dos; Ruíz-Sánchez, Esaú; Gamboa‐Angulo, Marcela; González-Coloma⊥, Azucena

doi:10.1007/s41348-018-0199-8

Cited by 2 publications

(1 citation statement)

References 27 publications

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“…Among all the fractions, FR7 (which was eluted with 60% hexane in EtOAc) was the most effective one in repelling bedbugs, as indicated by the high mean repellency (Table 3). This may be as a result of the presence of mid-polar compounds in the fraction, as was previously observed by Dos Santos et al 13 In his study, he identified polar and mid-polar compounds (flavonoids, phenols, and essential amino acids) present in extracts of teosinte and maize landrace. These compounds inhibited the growth and survival of Spodoptera frugiperda (Walker) larvae, a phytophagous maize insect.…”

Section: Mean Repellency Of Bedbugs On Exposure To Chromatographic Fr...supporting

confidence: 72%

Repellency and Toxicity of Selected Fractions, Identified Compounds and Blends of Commiphora africana Resin Against Bedbugs

Wairagu

Wachira

Githiomi

et al. 2022

Natural Product Communications

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Bedbugs are blood-feeding arthropods that cause anemia in humans upon heavy feeding. Control measures are unsuccessful due to resistance to development, environmental pollution, and cost. There is a need to explore natural herbal-based phytochemicals to combat bedbugs. In this study, compounds from Comiphora africana resin were sequentially extracted, fractionated, identified, and evaluated against bedbugs as individual compounds and in combinations. The chemical constituents of the most active fraction were identified using Gas Chromatography-Mass Spectrometry. Results showed that the dichloromethane crude extract had the highest mean repellency (98.5% with an LC50 of 4.96 mg/L after 24 and 72 h of exposure time, respectively), similar to the positive control (neocidol). Column chromatographic separation of the dichloromethane extract yielded 9 fractions where “FR7” (eluted with 60% n-hexane in ethyl acetate) demonstrated the highest mean repellency of 79.0% with an LC50 of 10.12 mg/L after 2 and 24 h exposure times, respectively. From the identified compounds of FR7, cedrol had significantly ( P < .05) higher mean repellency (80.5%) after 6 h of exposure and toxicity (27.43 mg/L) after 24 h exposure. A six-constituent blend of compounds from FR7 [9-octadecenoic acid-ethyl-ester, octadecadien-1-ol, citronellyl formate, cedrol, n-hexadecanoic acid, (1,2)-dihydro-6-methoxy-naphthalene] had the highest mean repellency (93.4% after 12 h exposure) and toxicity (8.83 mg/L after 72 h exposure) than the other blends and individual compounds. This study reports fractions/compounds that can be used in bedbug control measures.

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Section: Mean Repellency Of Bedbugs On Exposure To Chromatographic Fr...supporting

confidence: 72%

Repellency and Toxicity of Selected Fractions, Identified Compounds and Blends of Commiphora africana Resin Against Bedbugs

Wairagu

Wachira

Githiomi

et al. 2022

Natural Product Communications

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Toxicity of Caulerpa scalpelliformis selected fractions with fatty acids on Porthesia scintillans

Sahayaraj¹,

Ravindran²,

Jancy³

et al. 2021

Toxin Reviews

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Insect deterrent activity of ethanolic leaf extracts of landrace maize and determination of active compounds against Spodoptera littoralis Boisduval (Lepidoptera: Noctuidae)

Cited by 2 publications

References 27 publications

Repellency and Toxicity of Selected Fractions, Identified Compounds and Blends of Commiphora africana Resin Against Bedbugs

Repellency and Toxicity of Selected Fractions, Identified Compounds and Blends of Commiphora africana Resin Against Bedbugs

Toxicity of Caulerpa scalpelliformis selected fractions with fatty acids on Porthesia scintillans

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