Chemical composition and evaluation of mosquito larvicidal activity of &amp;lt;i&amp;gt;Vitex payos&amp;lt;/i&amp;gt; extracts against &amp;lt;i&amp;gt;Anopheles gambiae&amp;lt;/i&amp;gt; Giles S.S larvae

Nyamoita, Mokua Gladys; Mbwambo, Zakaria H.; Ochola, Bwire J.; Innocent, Ester; Lwande, Wilber; Hassanali, Ahmed

doi:10.5455/spatula.20130806054707

Cited by 6 publications

(2 citation statements)

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“…However, actual mortality rates were comparatively higher under semi-field conditions than those recorded under laboratory conditions in similar treatment concentrations of some fractions. This conformed to the findings of Kweka, et al, (2011) and Nyamoita, et al, (2013) with both groups attributing the higher larval mortalities under SFCs to contributions of other variables in the surroundings, a normal adaptive biodiversity output. According to Kweka, et al (2011), the exposure of plant extracts to sunlight triggers degradation of phytochemicals to their secondary metabolites, to which higher larval mortalities under SFCs than laboratory conditions had been attributed.…”

Section: Discussion:-supporting

confidence: 87%

“…Nevertheless, the authors had still found laboratory reared anopheline larvae to have been more susceptible than wild collected ones. On the other hand, the findings of this study were in line with those of Nyamoita, et al, (2013), who while testing the activity of Vitex payos against laboratory reared An. gambiae s.s larvae, found those under SFCs to have been more susceptible than the ones under laboratory conditions.…”

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confidence: 91%

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Larvicidal Efficacy of Fractionated Essential Oils of Tagetes Minuta, Ocimum Kilimandscharicum, and Artemisia Afra Against Anopheles Gambiae S.S.

OngauMisire¹,

MwajarNgeiywa²,

MuyomaWanjala³

2019

IJAR

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The study was carried out at the Centre for Global Health Research (CGHR) CDC-KEMRI located about 10 Km from Kisumu City along the Kisumu-Busia road. The station lies on the coordinates 0°4'40"N 34°40'38"E. Kisumu City, in western Kenya, is an area endemic for major infectious diseases including malaria. Research Design This study employed an experimental research design and followed the post-test only assessment. Two groups were randomly selected, the experimental and control groups, with the latter comprising of positive and negative controls. The positive controls contained the recommended 1 g/L of Bi-Larv TM 25 WP (a registered trademark product of Bayer Pharmaceutics Company in wettable powder containing 25% diflubenzuron, an insect growth regulator (IGR) as the active ingredient, and is listed under WHO Pre-Qualification (WHO-PQ) scheme) while the negative controls contained 1 mL acetone in 250 mL solution.

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Section: Discussion:-supporting

confidence: 87%

supporting

confidence: 91%

Larvicidal Efficacy of Fractionated Essential Oils of Tagetes Minuta, Ocimum Kilimandscharicum, and Artemisia Afra Against Anopheles Gambiae S.S.

OngauMisire¹,

MwajarNgeiywa²,

MuyomaWanjala³

2019

IJAR

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Agro-waste derived compounds (flax and black seed peels): Toxicological effect against the West Nile virus vector, Culex pipiens L. with special reference to GC–MS analysis

Farag

Essa

Alharbi

et al. 2021

Saudi Journal of Biological Sciences

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The development of different approaches to use agricultural residues as a source of high value-added products, become a must, especially after the problems emerged due to their accumulation. This contribution demonstrates the potential of agricultural residues, Linuim usitatissium (flax seed) and Nigella sativa (black seed) peels, as raw materials for the production of bioactive products, botanical insecticides, against Cx. pipiens , with deep analysis to their chemical constituents by gas chromatography-mass spectrometry, the larvicidal efficacies of the three crude extracts (methylene chloride, petroleum ether and methanol 70%) from the two plant waste peels were evaluated for the first time against the late third instar larvae of Cx. pipiens . Results indicated different lethal doses in larvae depending on the efficacy of organic solvent used. For both compounds methanol 70% extracts produced the highest dry yield. The most efficient solvent is petroleum ether in case of both flax and Black seed peels. Petroleum ether extract exhibited the highest toxicity against Cx. pipiens with an LC50 of 69.6383 ppm. The same results for black seed indicated that petroleum ether was the most efficient against Cx. pipiens with an LC50 of 40.7748 ppm. The study revealed for the first time the type of phytochemical constituents presents in peels of flax and black seeds using GC–MS analysis which revealed twenty-eight constituents among extracts of flax and black seed peels ranging from to 58.8711% to 99.99% of the total extracts. GC–MS profiling showed that a five constituents, 9-2-Methyl-Z, Z-3, 13 octadecadienol (terpenoid), 9,17-Octadecadienal, (Z)-, Nonanoic acid, 9-oxo-, methyl ester, 9,12-Octadecadienoic acid Z,Z and Octasiloxane, 1,1,3,3,5,5,7,7,9,9,11,11,13,13,15,15-hexadecamethyl- have insecticidal activity beside many other biological activities as recorded from a variety of botanical extracts. While the constituents like Hexadecanoic acid, methyl ester and cis -9-Hexadecenal, both of them are larvicidal, cis -Vaccenic acid and 9-Oxononanoic acid showing only an insecticidal activity beside Undecanoic acid the mosquito repellent. The other six constituents Linoelaidic acid, Oleic Acid, Z-2-Octadecen-1-ol, 1-Methoxy-3-hydroxymethylheptane, Cis-11,14–Eicosadieonic acid-methyl ester and Heptasiloxane, 1,1,3,3,5,5,7,7,9,9,11,11,13,13-tetradecamethyl- are constituents of other plant extracts which showed as a whole an insecticidal activity.

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Chemical composition and larvicidal activity againstAedesmosquitoes of flower extracts fromClitoria Ternatea

Ravindran

Bharathithasan

Ramaiah

et al. 2020

Preprint

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BackgroundMosquito is a human health tread nowadays, the major health problems caused by them are malaria, dengue fever, yellow fever, zika as well as several other outbreaks. The major problem in controlling dengue vectors are the resistant problems. Different classes of insecticides used for public have raised the concern of resistant problem with mosquitoes and environmental pollution. Thus, alternative chemical compounds search is necessary to be searched for overcoming the resistance problem of using pesticides in vectors and the chemical free environment respectively. Thus, to solve these problems, purpose of this study is to identify the larvicidal mechanism, metabolite, antioxidant, chemical compounds and its structure from C. ternatea flower and to test its efficacies against early 4 th instar larvae of Ae.aegypti and Ae albopictus. MethodsClitoria ternatea flowers were collected from the Garden of the Faculty of Medicine in International Quest University, Ipoh, Perak and used for crude extraction. Then, the metabolite test, antioxidant test, chromatography techniques were conducted to identify chemical composition of extracts and their chemical structures were identified using GCMS-QP2010 Ultra (Shimadzu). Next, following WHO procedures for larval bioassays, the extracts were used to evaluate against early 4 th instar larvae of Aedes mosquito vectors. ResultsThe larvicidal activity of Clitoria ternatea flowers extracts evidently affected the early 4 th instar larvae of Aedes mosquito vectors. The highest larvicidal activity was observed against early 4 th instar larvae of Ae. aegypti with the LC50 and LC95 values of 1056 and 2491 mg/L, respectively. Meanwhile larvae bioassay test for Ae.albopictus recorded with the LC50 and

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Chemical composition and evaluation of mosquito larvicidal activity of <i>Vitex payos</i> extracts against <i>Anopheles gambiae</i> Giles S.S larvae

Cited by 6 publications

References 0 publications

Larvicidal Efficacy of Fractionated Essential Oils of Tagetes Minuta, Ocimum Kilimandscharicum, and Artemisia Afra Against Anopheles Gambiae S.S.

Larvicidal Efficacy of Fractionated Essential Oils of Tagetes Minuta, Ocimum Kilimandscharicum, and Artemisia Afra Against Anopheles Gambiae S.S.

Agro-waste derived compounds (flax and black seed peels): Toxicological effect against the West Nile virus vector, Culex pipiens L. with special reference to GC–MS analysis

Chemical composition and larvicidal activity againstAedesmosquitoes of flower extracts fromClitoria Ternatea

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