Repellent and acaricidal activity of coconut oil fatty acids and their derivative compounds and catnip oil against Amblyomma sculptum

Barrozo, Mayara Macedo; Zeringóta, Viviane; Borges, Lígia Miranda Ferreira; Moraes, Nélio Roberto de; Benz, Kim; Farr, Amy; Zhu, Junwei

doi:10.1016/j.vetpar.2021.109591

Cited by 7 publications

(11 citation statements)

References 27 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…45 In tests for lasting effects, the CFAm aged for 7 days repelled 100% of T. rubida and scorpions and >80% of Turkestan cockroaches. Our results of week-long effectiveness in repellency from CFAm and some of their constituents correspond to those reported by Zhu et al 28 in biting flies, ticks, bed bugs, and mosquitos, and Barrozo et al 29 in ticks. Owing to the unpleasant odor of CFAm, 29 we mixed CFAm with lavender oil, a known odor-masking compound, and evaluated whether the addition of lavender oil affected the repellency of fresh or 7-day residual efficacy of CFAm.…”

Section: Discussionsupporting

confidence: 91%

“…Our results of week-long effectiveness in repellency from CFAm and some of their constituents correspond to those reported by Zhu et al 28 in biting flies, ticks, bed bugs, and mosquitos, and Barrozo et al 29 in ticks. Owing to the unpleasant odor of CFAm, 29 we mixed CFAm with lavender oil, a known odor-masking compound, and evaluated whether the addition of lavender oil affected the repellency of fresh or 7-day residual efficacy of CFAm. The Addition of lavender oil did not appear to decrease the repellent activity of CFAm residues, at least for 7 day.…”

Section: Discussionsupporting

confidence: 91%

“…The repellency of 7-day aged residues of lavender oil toward scorpions might indicate the high sensitivity of the scorpion sensory system. Although our overall results resembled those of Zhu et al 28 and Barrozo et al, 29 differences were observed in the lowest effective concentrations determined in each study. Whereas Zhu et al 28 and Barrozo et al 29 reported 0.4 mg cm −2 and 2.5 mg cm −2 as the lowest effective concentrations for each study, respectively, our studies showed much lower effective concentrations (at least 4 and 250 times lower).…”

Section: Discussionsupporting

confidence: 57%

“…Although our overall results resembled those of Zhu et al 28 and Barrozo et al, 29 differences were observed in the lowest effective concentrations determined in each study. Whereas Zhu et al 28 and Barrozo et al 29 reported 0.4 mg cm −2 and 2.5 mg cm −2 as the lowest effective concentrations for each study, respectively, our studies showed much lower effective concentrations (at least 4 and 250 times lower). The benefits of using lower concentrations are that less material is used when making the repellent, thus making the formulation less expensive while still being effective, and that the unwanted odors that might be emitted by higher concentrations might be diminished.…”

Section: Discussionsupporting

confidence: 57%

“…Recently, coconut-derived compounds have demonstrated lasting repellent activity against several blood-feeding arthropods including mosquitoes, kissing bugs, biting flies, bed bugs, and ticks. 28,29 Our study investigated the repellent effects of coconut fatty acid mixture CFAm and some of their constituents against Turkestan cockroaches, Arizona bark scorpions, and T. rubida. Behavioral evaluations in a laboratory setting indicated that CFAs were highly effective in repelling these arthropods, and this effectiveness was maintained for at least 1 week.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Coconut fatty acids exhibit strong repellency and week‐long efficacy against several urban pest arthropods of the southwestern United States

Agnew

Gorzelski

Zhu

et al. 2023

Pest Management Science

View full text Add to dashboard Cite

BACKGROUNDThe southwestern United States is home to a variety of arthropods including Turkestan cockroaches, Blatta lateralis (Walker); hematophagous kissing bugs, Tritoma rubida (Uhler); and Arizona bark scorpions, Centruroides sculpturatus Ewing. These arthropods cause medical concern when they become established around homes and/or invade indoors. Traditionally, the management of these pests has relied primarily on the use of chemical insecticides; however, they offer poor prospects for control owing to their lack of efficacy as well as the effects of insecticides on humans and the environment. Botanical repellents are an option that has not been fully investigated for the management of these pests. Here, we investigated the behavioral responses of common urban pests of the southwestern USA to recently discovered coconut fatty acids (CFAs), to establish the potential use of these compounds as repellents.RESULTSFresh residues of CFA mixture (CFAm) and their constituents caprylic acid, capric acid, capric acid methyl ester, lauric acid, and lauric acid methyl ester, tested at a concentration of 1 mg cm−2, strongly repelled all arthropods. The repellent activity of CFAm lasted for at least 7 days, and the addition of lavender oil, used as an odor‐masking agent, did not decrease this effect. Concentrations of CFAm ten times lower (0.1 mg cm−2) still repelled Turkestan cockroaches, and concentrations 100 times lower (0.01 mg cm−2) repelled T. rubida and scorpions.CONCLUSIONSCFAm and some of their constituents are efficacious, economical, and logistically feasible for inclusion in integrated pest management programs for these important urban pests of the southwestern USA. © 2023 Society of Chemical Industry.

show abstract