Oviposition and flight orientation response of Aedes aegypti to certain aromatic aryl hydrazono esters

Abstract

Aedes aegypti is a day-biting, highly anthropophilic mosquito and a potential vector of dengue and chikungunya in India. A. aegypti is a container breeder, generally oviposit in the stored and fresh water bodies, and discarded containers near residential areas that provide suitable habitats for oviposition by gravid females. The diurnal activity and endophilic nature of these mosquitoes have increased the frequency of contact with human being. Assured blood meal from human host in an infested area leads to increased disease occurrence. Gravid mosquitoes can potentially be lured to attractant-treated traps and could subsequently be killed with insecticides or growth regulators. In this direction, oviposition by A. aegypti females to aryl hydrazono esters (AHE)-treated bowls at 10 ppm concentration was tested in dual choice experiment, and their orientation response to these ester compounds was studied in Y-tube olfactometer. Among the esters tested, AHE-2, AHE-11 and AHE-12 elicited increased egg deposition with oviposition activity indices (OAI) of +0.39, +0.24 and +0.48, respectively, compared to control; in contrast, AHE-8, AHE-9 and AHE-10 showed negative oviposition response with OAI of -0.46, -0.35 and -0.29, respectively, at 10 mg/L. In the Y-tube olfactometer bioassay, AHE-2 attracted 60 % females compared to control, while to the odour of AHE-11 and AHE-12, about 70 % of the females were trapped in treated chambers. In contrast, only 27-30 % of gravid females entered the chamber releasing AHE-8, AHE-9 and AHE-10 odour plumes, while 70 % entered control chamber, evincing a possible non-preference of treatment odours as well as interference with olfactory receptors. These compounds have the potential for application as oviposition stimulants or deterrents for surveillance and control of mosquito population using ovitraps.

Effectiveness of Environmentally Friendly Mosquito Trap Contained Sugar Yeast Solution

“…The molecular mechanism of smelling in insects are very complex. Olfactory signals is an external stimuli that influence the mosquitoes behavior in finding a host, laying eggs and sucking food (sugar) (Cook, 2011;Guha, 2012;Mathew, 2013). Mosquitoes are classified in hematophagous group and it should able to find a suitable host for the reproductive process.…”

Insecticide Effect of Zeolites on the Tomato Leafminer Tuta absoluta (Lepidoptera: Gelechiidae)

“…Oviposition behavior is influenced by visual, tactile, and olfactory cues, with the first considered to be of primary importance when zeolites are used [60]. The layer of particle film covering the leaves reduces the attractiveness of visual cues and prevents insects from recognizing and finding plant parts on which they prefer to lay eggs [19].…”

Behavioral and electrophysiological responses of Culex quinquefasciatus to certain fatty acid esters

“…Dual choice oviposition bioassays were conducted according to Guha et al (2012) with slight modifications. Ten female mosquitoes were offered with oviposition substrate 72 h post blood meal when they became fully gravid.…”