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J Econ Entomol

Title:		Avoidance Behavior to Guava Leaf Volatile Oil by Three Medically Important Mosquito Vectors
Author(s):		Jhaiaun P; Panthawong A; Sukkanon C; Chareonviriyaphap T;
Address:		"Department of Entomology, Faculty of Agriculture, Kasetsart University, Bangkok, Thailand. Department of Medical Technology, School of Allied Health Sciences, Walailak University, Nakhon Si Thammarat, Thailand"
Journal Title:		J Econ Entomol
Year:		2021
Volume:		114
Issue:		6
Page Number:		2534 - 2542
DOI:		10.1093/jee/toab193
ISSN/ISBN:		1938-291X (Electronic) 0022-0493 (Linking)
Abstract:		"Volatile organic compounds from various plants have received popular interest as one of the vector control tools due to their eco-friendliness and insect-repellent activities. In this study, an excito-repellency assay system was used to examine the noncontact repellency, contact excitation, and knockdown (KD) effects of guava leaf (Psidium guajava L.) oil against Anopheles minimus (Theobald), Anopheles epiroticus (Linton & Harbach), and Culex quinquefasciatus (Say). The organic components of guava oil were identified by gas chromatography-mass spectrometry analysis with dl-limonene (17.4%), cymene (5.49%), and alpha-terpinene (5.20%) as the major constituents. At concentrations of 2.5 and 5.0%, 100% escape of An. minimus was recorded in the contact assay and 96-98% escape in the noncontact assay. Guava oil stimulated potent irritant (92% escape) and repellent (61-86% escape) effects against Cx. quinquefasciatus. A lower repellency action was observed against An. epiroticus (17-20% escape). No KD effect was observed for guava oil against An. minimus and Cx. quinquefasciatus at any concentration. However, An. epiroticus was more prone to KD effects, with the highest percentage KD (44% in nonescape group) observed with 5.0% guava oil in the noncontact assay. Mortalities of 35% and 11% were observed for An. epiroticus in the nonescape groups in the contact and noncontact assays, respectively. Concentrations of 1.0% and 2.5% guava oil led to <2% mortality in An. minimus. Our findings highlight guava oil as a promising plant-based mosquito repellent that can be included in insecticide formulations for future mosquito control programs"
Keywords:		"*Aedes Animals Avoidance Learning *Culex *Insect Repellents *Insecticides Mosquito Control Mosquito Vectors *Oils, Volatile Plant Leaves *Psidium Anopheles epiroticus Anopheles minimus Culex quinquefasciatus Psidium guajava excito-repellency;"
Notes:		"MedlineJhaiaun, Pairpailin Panthawong, Amonrat Sukkanon, Chutipong Chareonviriyaphap, Theeraphap eng Research Support, Non-U.S. Gov't England 2021/10/20 J Econ Entomol. 2021 Dec 6; 114(6):2534-2542. doi: 10.1093/jee/toab193"