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S Ignacimuthu - One of the best experts on this subject based on the ideXlab platform.
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bioefficacy of blumea mollis d don merr and hygrophila schulii buch ham syn h auriculata against helicoverpa armigera hubner
Archives of Phytopathology and Plant Protection, 2015Co-Authors: Kathirvelu Baskar, Anbalagan Santhosh Kumar, Soosaimanickam Maria Packiam, S IgnacimuthuAbstract:Indiscriminate use of synthetic pesticides to control the pests causes negative effects on non-target organisms. Some of the chemicals under B and C categories are carcinogenic to humans. The present study was aimed to assess the Antifeedant, larvicidal and pupicidal activities of Hygrophila schulii (syn. H. auriculata) and Blumea mollis against Helicoverpa armigera. Maximum Antifeedant activity of 70.01% was observed in ethyl acetate extract of H. schulii at 5.0% concentration with LC50 value of 2.0%. B. mollis ethyl acetate extract at 5.0% concentration showed Antifeedant activity of 35.40% with LC50 value of 8.38%. The data for Antifeedant activity showed homogeneity of variances in Levene Statistics and normality in Shapiro–Wilk test. Ethyl acetate extract of H. schulii at 5.0% concentration showed 68.66% larvicidal activity with LC50 value of 2.97%. It also showed 73.33% pupicidal activity and was statistically significant from other treatments. No pupicidal activity was observed in ethyl acetate ext...
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bioefficacy of the triterpenoid friedelin against helicoverpa armigera hub and spodoptera litura fab lepidoptera noctuidae
Pest Management Science, 2014Co-Authors: Kathirvelu Baskar, Veeramuthu Duraipandiyan, S IgnacimuthuAbstract:BACKGROUND The triterpenoid friedelin isolated from hexane extract of Azima tetracantha leaves was evaluated for its Antifeedant, larvicidal and pupicidal activities against Helicoverpa armigera and Spodoptera litura at 125, 250, 500 and 1000 ppm concentration. RESULTS Friedelin exhibited Antifeedant (84.57 and 75.28%), larvicidal (72.88 and 66%) and pupicidal (76.18 and 66.66%) activities against H. armigera and S. litura respectively. The homogeneity of variances (Levene statistic) showed significant deviation for the Antifeedant, larvicidal and pupicidal activities of friedelin against H. armigera and S. litura. It exhibited LC50 values of 130.47 and 226.41 ppm for Antifeedant and 509.56 and 607.99 ppm for larvicidal activities against H. armigera and S. litura respectively. In linear regression analysis, significant and high correlation was noted between concentration and Antifeedant activity with R2 = 0.84 and 0.79 and between concentration and larvicidal activity with R2 = 0.81 and 0.76 against H. armigera and S. litura respectively. CONCLUSION Regression between Antifeedant and larvicidal activities also showed significant activity (P = 0.00) with R2 = 0.79 for H. armigera and R2 = 0.70 for S. litura. Friedelin showed good activity against both the pests. Friedelin did not show any toxicity against freshwater fish Cyprinus carpio at 100 mg L−1. Friedelin could be used to prepare a botanical formulation to control the agricultural pests. © 2014 Society of Chemical Industry
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Antifeedant and larvicidal activities of acalypha fruticosa forssk euphorbiaceae against plutella xylostella l lepidoptera yponomeutidae larvae
Journal of King Saud University - Science, 2011Co-Authors: S Lingathurai, Ezhil S Vendan, Gabriel M Paulraj, S IgnacimuthuAbstract:Abstract Antifeedant and larvicidal activities of hexane, chloroform and ethyl acetate extracts of Acalypha fruticosa Forssk. Leaves were studied using leaf disc no-choice method against third instar larvae of Plutella xylostella L. Chloroform extract showed maximum Antifeedant activity of 92.8% at 5% concentration with a LC 50 value of 1.86%. Nine fractions were collected from the chloroform extract (30 g) by silica gel column chromatography, among which the seventh fraction (eluted by 100% ethyl acetate) recorded maximum Antifeedant activity (84.3%) at 1000 ppm concentration with a LC 50 value of 385.7 ppm against the third instar larvae of P. xylostella . Preliminary phytochemical analysis of this effective fraction showed the presence of terpenoids, tannins, coumarins, anthraquinones and saponins.
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Antifeedant larvicidal and pupicidal activities of atalantia monophylla l correa against helicoverpa armigera hubner lepidoptera noctuidae
Chemosphere, 2009Co-Authors: Kathirvelu Baskar, Selvadurai Kingsley, Subramanian Ezhil Vendan, Michael Gabrial Paulraj, Veeramuthu Duraipandiyan, S IgnacimuthuAbstract:Abstract Antifeedant, larvicidal and pupicidal activities of hexane, chloroform and ethyl acetate extracts of Atlantia monophylla leaf were studied against third instar larvae of Helicoverpa armigera . All the extracts showed feeding deterrent, larvicidal and pupicidal effects in a dose dependent manner. Significant Antifeedant, larvicidal and pupicidal activities were observed only in hexane extract. The hexane extract was subjected to fractionation using silica gel column chromatography. Twelve fractions were obtained. Ninth fraction showed good Antifeedant, larvicidal, pupicidal activities and disrupted adult emergence. LC 50 value was at 384.57 ppm for larval mortality. The active fraction at 1000 ppm concentration had 100% pupal mortality.
Mamoru Koketsu - One of the best experts on this subject based on the ideXlab platform.
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antitermite activity of 7 alkoxycoumarins and related analogs against coptotermes formosanus shiraki
International Biodeterioration & Biodegradation, 2012Co-Authors: Morina Adfa, Tsuyoshi Yoshimura, Yosuke Hattori, Mamoru KoketsuAbstract:Abstract Twenty-three 7-alkoxycoumarins and related analogs were synthesized from 7-hydroxycoumarin by treatment with various alkyl/aryl/acyl halides and potassium carbonate in DMF. Their Antifeedant and termiticidal activities against Coptotermes formosanus Shiraki were examined. Among the 23 compounds and control, 7-cyclohexyloxycoumarin (2k), exhibited the highest termiticidal activity in no-choice test, followed by 7-(4-nitrophenoxy)coumarin (2q), and 7-(2-butynyloxy)coumarin (2u) at 5 μmol/disc. On the other hand, all of 7-alkoxycoumarins showed Antifeedant activity except 7-hexadecyloxycoumarin (2i) and 7-octadecyloxycoumarin (2j), while 7-ethoxycoumarin (2b) demonstrated the highest Antifeedant activity. The results suggested that a presence of cyclohexyloxy and aryloxy groups at C-7 position of coumarin skeleton was found to be important for the termiticidal and Antifeedant activities. Arylalkoxy groups having methoxy groups at benzene ring, alkenoxy, and alkynoxy groups led to analogs with good termiticidal activity, while the incorporation of alkoxy groups with longer alkyl chains tended to reduce both the termiticidal and Antifeedant activities.
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Chemical constituents of Indonesian plant Protium javanicum Burm. f. and their Antifeedant activities against Coptotermes formosanus Shiraki
Natural product research, 2012Co-Authors: Morina Adfa, Tsuyoshi Yoshimura, Masayuki Ninomiya, Yosuke Hattori, Yasuhiro Funahashi, Mamoru KoketsuAbstract:In the continuing study of Antifeedant compounds in Protium javanicum Burm. f. against Coptotermes formosanus Shiraki, 6-desacetylnimbin (1), quercitrin (2) and myricitrin (3) were isolated from P. javanicum extract. All compounds were characterised by NMR and MS. Furthermore, the structure of 6-desacetylnimbin was confirmed by X-ray crystallography. The Antifeedant activity was evaluated with no-choice feeding tests. At a dose of 0.5 mg, 6-desacetylnimbin exhibited the highest Antifeedant activity among the isolates.
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Antifeedant and termiticidal activities of 6 alkoxycoumarins and related analogs against coptotermes formosanus shiraki
Journal of Chemical Ecology, 2011Co-Authors: Morina Adfa, Tsuyoshi Yoshimura, Yosuke Hattori, Kenichi Komura, Mamoru KoketsuAbstract:We synthesized 23 6-alkoxycoumarin derivatives, 20 of which are novel compounds. The structures of all compounds were confirmed by NMR, MS, and elemental analysis, and their Antifeedant and termiticidal activities against Coptotermes formosanus Shiraki were examined. In a no-choice test, 6-(2-pentynyloxy)coumarin (2v), 6-(2-butynyloxy)coumarin (2u), 6-(2-octynyloxy)coumarin (2w), and 6-methoxycoumarin (2a), demonstrated high termiticidal activity at a concentration of 10 μmol. At a concentration of 5 μmol, 6-(2-butynyloxy)coumarin (2u) produced the highest mortality among the compounds tested. On the other hand, all of the 6-alkoxycoumarins showed Antifeedant activity at both concentrations, except 6-octadecyloxycoumarin (2j) that was inactive at 5 μmol. Among the 23 compounds and the control, 6-ethoxycoumarin (2b), 6-isopropoxycoumarin (2d), and 6-isobutoxycoumarin (2f) exhibited the highest Antifeedant activity with no mass loss (0.00%) at a concentration of 10 μmol. Our findings indicate that the presence of alkenyloxy and alkynyloxy groups was important for the termiticidal activity, while the incorporation of alkoxy groups with longer alkyl chains tended to reduce both the termiticidal and Antifeedant activities. Furthermore, short chain alkoxy and arylalkoxy-substituted analogs showed good Antifeedant activity, but methoxy groups on the benzene ring had a negative effect.
Kathirvelu Baskar - One of the best experts on this subject based on the ideXlab platform.
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bioefficacy of blumea mollis d don merr and hygrophila schulii buch ham syn h auriculata against helicoverpa armigera hubner
Archives of Phytopathology and Plant Protection, 2015Co-Authors: Kathirvelu Baskar, Anbalagan Santhosh Kumar, Soosaimanickam Maria Packiam, S IgnacimuthuAbstract:Indiscriminate use of synthetic pesticides to control the pests causes negative effects on non-target organisms. Some of the chemicals under B and C categories are carcinogenic to humans. The present study was aimed to assess the Antifeedant, larvicidal and pupicidal activities of Hygrophila schulii (syn. H. auriculata) and Blumea mollis against Helicoverpa armigera. Maximum Antifeedant activity of 70.01% was observed in ethyl acetate extract of H. schulii at 5.0% concentration with LC50 value of 2.0%. B. mollis ethyl acetate extract at 5.0% concentration showed Antifeedant activity of 35.40% with LC50 value of 8.38%. The data for Antifeedant activity showed homogeneity of variances in Levene Statistics and normality in Shapiro–Wilk test. Ethyl acetate extract of H. schulii at 5.0% concentration showed 68.66% larvicidal activity with LC50 value of 2.97%. It also showed 73.33% pupicidal activity and was statistically significant from other treatments. No pupicidal activity was observed in ethyl acetate ext...
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bioefficacy of the triterpenoid friedelin against helicoverpa armigera hub and spodoptera litura fab lepidoptera noctuidae
Pest Management Science, 2014Co-Authors: Kathirvelu Baskar, Veeramuthu Duraipandiyan, S IgnacimuthuAbstract:BACKGROUND The triterpenoid friedelin isolated from hexane extract of Azima tetracantha leaves was evaluated for its Antifeedant, larvicidal and pupicidal activities against Helicoverpa armigera and Spodoptera litura at 125, 250, 500 and 1000 ppm concentration. RESULTS Friedelin exhibited Antifeedant (84.57 and 75.28%), larvicidal (72.88 and 66%) and pupicidal (76.18 and 66.66%) activities against H. armigera and S. litura respectively. The homogeneity of variances (Levene statistic) showed significant deviation for the Antifeedant, larvicidal and pupicidal activities of friedelin against H. armigera and S. litura. It exhibited LC50 values of 130.47 and 226.41 ppm for Antifeedant and 509.56 and 607.99 ppm for larvicidal activities against H. armigera and S. litura respectively. In linear regression analysis, significant and high correlation was noted between concentration and Antifeedant activity with R2 = 0.84 and 0.79 and between concentration and larvicidal activity with R2 = 0.81 and 0.76 against H. armigera and S. litura respectively. CONCLUSION Regression between Antifeedant and larvicidal activities also showed significant activity (P = 0.00) with R2 = 0.79 for H. armigera and R2 = 0.70 for S. litura. Friedelin showed good activity against both the pests. Friedelin did not show any toxicity against freshwater fish Cyprinus carpio at 100 mg L−1. Friedelin could be used to prepare a botanical formulation to control the agricultural pests. © 2014 Society of Chemical Industry
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Antifeedant larvicidal and pupicidal activities of atalantia monophylla l correa against helicoverpa armigera hubner lepidoptera noctuidae
Chemosphere, 2009Co-Authors: Kathirvelu Baskar, Selvadurai Kingsley, Subramanian Ezhil Vendan, Michael Gabrial Paulraj, Veeramuthu Duraipandiyan, S IgnacimuthuAbstract:Abstract Antifeedant, larvicidal and pupicidal activities of hexane, chloroform and ethyl acetate extracts of Atlantia monophylla leaf were studied against third instar larvae of Helicoverpa armigera . All the extracts showed feeding deterrent, larvicidal and pupicidal effects in a dose dependent manner. Significant Antifeedant, larvicidal and pupicidal activities were observed only in hexane extract. The hexane extract was subjected to fractionation using silica gel column chromatography. Twelve fractions were obtained. Ninth fraction showed good Antifeedant, larvicidal, pupicidal activities and disrupted adult emergence. LC 50 value was at 384.57 ppm for larval mortality. The active fraction at 1000 ppm concentration had 100% pupal mortality.
González-coloma Azucena - One of the best experts on this subject based on the ideXlab platform.
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Biocidal effects of Piper hispidinervum (Piperaceae) essential oil and synergism among its main components
'Elsevier BV', 2019Co-Authors: Mª Fé Andrés, Rossa G. E., Cassel E., Vargas R. M. F., Santana O., Díaz, Carmen E., González-coloma AzucenaAbstract:In this study we evaluated the effect of a pressure gradient (1–2 atm) in the extraction and composition of the essential oil (EO) of Piper hispidinervum by steam distillation. We also evaluated the insect Antifeedant effects (Spodoptera littoralis, Leptinotarsa decemlineata, Myzus persicae and Rhopalosiphum padi) and nematicidal activity (Meloidogyne javanica) of the oils, their major components and their synergistic interactions. Safrole was the major component (78–81%) followed by terpinolene (5–9%). The EOs tested were effective insect Antifeedants. Safrole, explained most of the insect Antifeedant action of P. hispidinervum EOs. When safrole and terpinolene were tested in binary combinations, low ratios of safrole improved the Antifeedant effects of terpinolene. P. hispidinervum EOs caused higher mortality of M. javanica juveniles than their major components. In binary combinations, low ratios of terpinolene increased the nematicidal effects of safrole. The EO treatment strongly suppressed nematode egg hatching and juvenile infectivity. P. hispidinervum EOs affected the germination of S. lycopersicum and L. sativa mostly at 24 h of treatment, being L. sativa the most sensitive. Safrole moderately affected germination and root growth of L. sativa, S. lycopersicum and L. perenne. Terpinolene only affected S. lycopersicum root growth.This work has been supported by grants 2011BR0081 (CSIC-Spain/ CNPq-Brazil cooperation program) and CTQ2015-64049-C3-1-R (Spain).Peer Reviewe
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Insect Antifeedant and ixodicidal compounds from Senecio adenotrichius
'Wiley', 2019Co-Authors: Ruiz-vasquez Liliana, González-coloma Azucena, Olmeda García, Ángeles Sonia, Zúñiga Navarro Gustavo, Villarroel Luis, Echeverri, Luis Fernando, Reina MatíasAbstract:Nine eremophilane sesquiterpenes 1 – 9, two flavonoids 11 and 12, and two known pirrolizidine alkaloids 13 and 14, were isolated from Senecio adenotrichius DC. Their structures were elucidated on the basis of spectroscopic data and by comparison with previously reported spectroscopic data of similar compounds. Compounds 5, 7, and 9 have not been previously reported as natural products. The Antifeedant activity of these compounds was tested against Spodoptera litoralis and Myzus persicae. Eremophilanes 1, 3, and 8 were strong Antifeedants to M. persicae, and 1 and 8 to Spodoptera littoralis. Their ixodicidal activity was tested against the tick Hyalomma lusitanicum, with eremophilanes 1, 3, and 8, being strong ixodicidal agents.This work has been supported by grants CTQ2012‐38219‐C03‐01, CTQ2015‐64049‐C3‐1‐R, AGL2012‐37957 (MINECO), and Villamagna SA. L. R.‐V. gratefully acknowledges JAE‐CSIC predoctoral fellowship.Peer Reviewe
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Chemical Composition and Biological Activities of Artemisia pedemontana subsp. assoana Essential Oils and Hydrolate
'MDPI AG', 2019Co-Authors: Sainz Paula, Díaz, Carmen E., María Fe Andrés, Martínez Díaz, Rafael A., Bailén María, Navarro Rocha Juliana, González-coloma AzucenaAbstract:Given the importance of the genus Artemisia as a source of valuable natural products, the rare plant Artemisia pedemontana subspecies assoana, endemic to the Iberian Peninsula, has been experimentally cultivated in the greenhouse and aeroponically, to produce biomass for essential oil (EO) extraction. The chemical composition of the EOs was analyzed, and their plant protection (insects: Spodoptera littoralis, Rhopalosiphum padi, and Myzus persicae; plants: Lactuca sativa and Lolium perenne; fungi: Aspergillus niger; and nematode: Meloidogyne javanica) and antiparasitic (Trypanosoma cruzi, Phytomonas davidi, and antiplasmodial by the ferriprotoporphyrin biocrystallization inhibition test) properties were studied, in addition to the hydrolate by-product. The EOs showed a 1,8-cineole and camphor profile, with quantitative and qualitative chemical differences between the cultivation methods. These oils had moderate insect Antifeedant, antifungal, and phytotoxic effects; were trypanocidel; and exhibited moderate phytomonacidal effects, while the hydrolate showed a strong nematicidal activity. Both EOs were similarly Antifeedant; the EO from the greenhouse plants (flowering stage) was more biocidal (antifungal, nematicidal, and phytotoxic) than the EO from the aeroponic plants (growing stage), which was more antiparasitic. The major components of the oils (1,8-cineole and camphor), or their 1:1 combination, did not explain any of these effects. We can conclude that these EOs have potential applications as insect Antifeedants, and as antifungal or antiparasitic agents, depending on the cultivation method, and that the hydrolate byproduct is a potent nematicidal.Publishe
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Chemical composition and biological activities of artemisia pedemontana subsp. Assoana essential oils and hydrolate
2019Co-Authors: Sainz Paula, Díaz, Carmen E., María Fe Andrés, Martínez Díaz, Rafael A., Bailén María, Navarro Rocha Juliana, González-coloma AzucenaAbstract:Given the importance of the genus Artemisia as a source of valuable natural products, the rare plant Artemisia pedemontana subspecies assoana, endemic to the Iberian Peninsula, has been experimentally cultivated in the greenhouse and aeroponically, to produce biomass for essential oil (EO) extraction. The chemical composition of the EOs was analyzed, and their plant protection (insects: Spodoptera littoralis, Rhopalosiphum padi, and Myzus persicae; plants: Lactuca sativa and Lolium perenne; fungi: Aspergillus niger; and nematode: Meloidogyne javanica) and antiparasitic (Trypanosoma cruzi, Phytomonas davidi, and antiplasmodial by the ferriprotoporphyrin biocrystallization inhibition test) properties were studied, in addition to the hydrolate by-product. The EOs showed a 1, 8-cineole and camphor profile, with quantitative and qualitative chemical differences between the cultivation methods. These oils had moderate insect Antifeedant, antifungal, and phytotoxic effects; were trypanocidel; and exhibited moderate phytomonacidal effects, while the hydrolate showed a strong nematicidal activity. Both EOs were similarly Antifeedant; the EO from the greenhouse plants (flowering stage) was more biocidal (antifungal, nematicidal, and phytotoxic) than the EO from the aeroponic plants (growing stage), which was more antiparasitic. The major components of the oils (1, 8-cineole and camphor), or their 1:1 combination, did not explain any of these effects. We can conclude that these EOs have potential applications as insect Antifeedants, and as antifungal or antiparasitic agents, depending on the cultivation method, and that the hydrolate byproduct is a potent nematicidal
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Chemical Composition and biological activities of artemisia pedemontana subsp. assoana essential oils and hydrolate
'MDPI AG', 2019Co-Authors: Sainz Paula, Díaz, Carmen E., María Fe Andrés, Martínez Díaz, Rafael A., Bailén María, Navarro Rocha Juliana, González-coloma AzucenaAbstract:Given the importance of the genus Artemisia as a source of valuable natural products, the rare plant Artemisia pedemontana subspecies assoana, endemic to the Iberian Peninsula, has been experimentally cultivated in the greenhouse and aeroponically, to produce biomass for essential oil (EO) extraction. The chemical composition of the EOs was analyzed, and their plant protection (insects: Spodoptera littoralis, Rhopalosiphum padi, and Myzus persicae; plants: Lactuca sativa and Lolium perenne; fungi: Aspergillus niger; and nematode: Meloidogyne javanica) and antiparasitic (Trypanosoma cruzi, Phytomonas davidi, and antiplasmodial by the ferriprotoporphyrin biocrystallization inhibition test) properties were studied, in addition to the hydrolate by-product. The EOs showed a 1,8-cineole and camphor profile, with quantitative and qualitative chemical differences between the cultivation methods. These oils had moderate insect Antifeedant, antifungal, and phytotoxic effects; were trypanocidel; and exhibited moderate phytomonacidal effects, while the hydrolate showed a strong nematicidal activity. Both EOswere similarly Antifeedant; the EOfromthe greenhouse plants (flowering stage) was more biocidal (antifungal, nematicidal, and phytotoxic) than the EO from the aeroponic plants (growing stage), which was more antiparasitic. The major components of the oils (1,8-cineole and camphor), or their 1:1 combination, did not explain any of these effects. We can conclude that these EOs have potential applications as insect Antifeedants, and as antifungal or antiparasitic agents, depending on the cultivation method, and that the hydrolate byproduct is a potent nematicidalThis research was funded by MINECO/FEDER grant CTQ2015-64049-C3-1-R. P. Sainz was funded by a MINECO FPI predoctoral gran
Chung Gyoo Park - One of the best experts on this subject based on the ideXlab platform.
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spatial repellency Antifeedant activity and toxicity of three medium chain fatty acids and their methyl esters of coconut fatty acid against stable flies
Pest Management Science, 2020Co-Authors: Gwang H Roh, Xiaaojie Zhou, Yansu Wang, Steven C Cermak, James A Kenar, Alexander Lehmann, Baoyu Han, David B Taylor, Xiaopeng Zeng, Chung Gyoo ParkAbstract:BACKGROUND Stable flies are one of the most detrimental arthropod pests to livestock. With changing climates and agronomic practices, they expand their roles as pests and disease vectors as well. Their painful bites reduce livestock productivity, annoy companion animals, and interfere with human recreational activities. Current management technologies are unable to effectively control stable flies. The present study reports new results concerning the contact, spatial repellency, and toxicity of a bio-based product, coconut fatty acid and their methyl ester derivatives of free fatty acids of C8:0 , C10:0 and C12:0 to stable flies. RESULTS Three medium chain fatty acid methyl esters (C8:0 , C10:0 and C12:0 ) showed strong Antifeedant activity against stable flies and their strengths were dose-dependent. Only the C8:0 acid, C8:0 - and C10:0 methyl esters elicited significant antennal responses. Laboratory single cage olfactometer bioassays revealed that coconut fatty acid and C8:0 methyl ester displayed active spatial repellency. All three methyl esters showed strong toxicity against stable flies. CONCLUSION Antifeedant activity is the main method through which coconut fatty acid deters stable fly blood-feeding. The C8:0 , C10:0 and C12:0 methyl esters act not only as strong Antifeedants, but also possess strong toxicity against stable fly adults. Limited spatial repellency was observed from coconut fatty acid and C8:0 methyl ester. © 2019 Society of Chemical Industry.